# Class yii\db\sqlite\QueryBuilder

Inheritance | yii\db\sqlite\QueryBuilder » yii\db\QueryBuilder » yii\base\BaseObject
Implements | yii\base\Configurable
Available since version | 2.0
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/db/sqlite/QueryBuilder.php

QueryBuilder is the query builder for SQLite databases.

## Public Properties

Hide inherited properties

Property | Type | Description | Defined By
--- | --- | --- | ---
$db | yii\db\Connection | The database connection. | yii\db\QueryBuilder
$separator | string | The separator between different fragments of a SQL statement. | yii\db\QueryBuilder
$typeMap | array | Mapping from abstract column types (keys) to physical column types (values). | yii\db\sqlite\QueryBuilder

## Protected Properties

Hide inherited properties

Property | Type | Description | Defined By
--- | --- | --- | ---
$conditionBuilders | array | Map of query condition to builder methods. | yii\db\QueryBuilder
$conditionClasses | array | Map of condition aliases to condition classes. | yii\db\QueryBuilder
$expressionBuilders | string[]|yii\db\ExpressionBuilderInterface[] | Maps expression class to expression builder class. | yii\db\QueryBuilder

## Public Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
__call() | Calls the named method which is not a class method. | yii\base\BaseObject
__construct() | Constructor. | yii\db\QueryBuilder
__get() | Returns the value of an object property. | yii\base\BaseObject
__isset() | Checks if a property is set, i.e. defined and not null. | yii\base\BaseObject
__set() | Sets value of an object property. | yii\base\BaseObject
__unset() | Sets an object property to null. | yii\base\BaseObject
addCheck() | Creates a SQL command for adding a check constraint to an existing table. | yii\db\sqlite\QueryBuilder
addColumn() | Builds a SQL statement for adding a new DB column. | yii\db\QueryBuilder
addCommentOnColumn() | Builds a SQL command for adding comment to column. | yii\db\sqlite\QueryBuilder
addCommentOnTable() | Builds a SQL command for adding comment to table. | yii\db\sqlite\QueryBuilder
addDefaultValue() | Creates a SQL command for adding a default value constraint to an existing table. | yii\db\sqlite\QueryBuilder
addForeignKey() | Builds a SQL statement for adding a foreign key constraint to an existing table. | yii\db\sqlite\QueryBuilder
addPrimaryKey() | Builds a SQL statement for adding a primary key constraint to an existing table. | yii\db\sqlite\QueryBuilder
addUnique() | Creates a SQL command for adding an unique constraint to an existing table. | yii\db\sqlite\QueryBuilder
alterColumn() | Builds a SQL statement for changing the definition of a column. | yii\db\sqlite\QueryBuilder
batchInsert() | Generates a batch INSERT SQL statement. | yii\db\sqlite\QueryBuilder
bindParam() | Helper method to add $value to $params array using PARAM_PREFIX. | yii\db\QueryBuilder
build() | Generates a SELECT SQL statement from a yii\db\Query object. | yii\db\sqlite\QueryBuilder
buildAndCondition() | Connects two or more SQL expressions with the `AND` or `OR` operator. | yii\db\QueryBuilder
buildBetweenCondition() | Creates an SQL expressions with the `BETWEEN` operator. | yii\db\QueryBuilder
buildColumns() | Processes columns and properly quotes them if necessary. | yii\db\QueryBuilder
buildCondition() | Parses the condition specification and generates the corresponding SQL expression. | yii\db\QueryBuilder
buildExistsCondition() | Creates an SQL expressions with the `EXISTS` operator. | yii\db\QueryBuilder
buildExpression() | Builds given $expression | yii\db\QueryBuilder
buildFrom() |  | yii\db\QueryBuilder
buildGroupBy() |  | yii\db\QueryBuilder
buildHashCondition() | Creates a condition based on column-value pairs. | yii\db\QueryBuilder
buildHaving() |  | yii\db\QueryBuilder
buildInCondition() | Creates an SQL expressions with the `IN` operator. | yii\db\QueryBuilder
buildJoin() |  | yii\db\QueryBuilder
buildLikeCondition() | Creates an SQL expressions with the `LIKE` operator. | yii\db\QueryBuilder
buildLimit() |  | yii\db\sqlite\QueryBuilder
buildNotCondition() | Inverts an SQL expressions with `NOT` operator. | yii\db\QueryBuilder
buildOrderBy() |  | yii\db\QueryBuilder
buildOrderByAndLimit() | Builds the ORDER BY and LIMIT/OFFSET clauses and appends them to the given SQL. | yii\db\QueryBuilder
buildSelect() |  | yii\db\QueryBuilder
buildSimpleCondition() | Creates an SQL expressions like `"column" operator value`. | yii\db\QueryBuilder
buildUnion() |  | yii\db\sqlite\QueryBuilder
buildWhere() |  | yii\db\QueryBuilder
buildWithQueries() |  | yii\db\QueryBuilder
canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\BaseObject
canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\BaseObject
checkIntegrity() | Enables or disables integrity check. | yii\db\sqlite\QueryBuilder
className() | Returns the fully qualified name of this class. | yii\base\BaseObject
createConditionFromArray() | Transforms $condition defined in array format (as described in yii\db\Query::where() to instance of yii\db\condition\ConditionInterface according to $conditionClasses map. | yii\db\QueryBuilder
createIndex() | Builds a SQL statement for creating a new index. | yii\db\sqlite\QueryBuilder
createTable() | Builds a SQL statement for creating a new DB table. | yii\db\QueryBuilder
createView() | Creates a SQL View. | yii\db\QueryBuilder
delete() | Creates a DELETE SQL statement. | yii\db\QueryBuilder
dropCheck() | Creates a SQL command for dropping a check constraint. | yii\db\sqlite\QueryBuilder
dropColumn() | Builds a SQL statement for dropping a DB column. | yii\db\sqlite\QueryBuilder
dropCommentFromColumn() | Builds a SQL command for adding comment to column. | yii\db\sqlite\QueryBuilder
dropCommentFromTable() | Builds a SQL command for adding comment to table. | yii\db\sqlite\QueryBuilder
dropDefaultValue() | Creates a SQL command for dropping a default value constraint. | yii\db\sqlite\QueryBuilder
dropForeignKey() | Builds a SQL statement for dropping a foreign key constraint. | yii\db\sqlite\QueryBuilder
dropIndex() | Builds a SQL statement for dropping an index. | yii\db\sqlite\QueryBuilder
dropPrimaryKey() | Builds a SQL statement for removing a primary key constraint to an existing table. | yii\db\sqlite\QueryBuilder
dropTable() | Builds a SQL statement for dropping a DB table. | yii\db\QueryBuilder
dropUnique() | Creates a SQL command for dropping an unique constraint. | yii\db\sqlite\QueryBuilder
dropView() | Drops a SQL View. | yii\db\QueryBuilder
executeResetSequence() | Execute a SQL statement for resetting the sequence value of a table's primary key. | yii\db\QueryBuilder
getColumnType() | Converts an abstract column type into a physical column type. | yii\db\QueryBuilder
getExpressionBuilder() | Gets object of yii\db\ExpressionBuilderInterface that is suitable for $expression. | yii\db\QueryBuilder
hasMethod() | Returns a value indicating whether a method is defined. | yii\base\BaseObject
hasProperty() | Returns a value indicating whether a property is defined. | yii\base\BaseObject
init() | Initializes the object. | yii\db\QueryBuilder
insert() | Creates an INSERT SQL statement. | yii\db\QueryBuilder
renameColumn() | Builds a SQL statement for renaming a column. | yii\db\sqlite\QueryBuilder
renameTable() | Builds a SQL statement for renaming a DB table. | yii\db\sqlite\QueryBuilder
resetSequence() | Creates a SQL statement for resetting the sequence value of a table's primary key. | yii\db\sqlite\QueryBuilder
selectExists() | Creates a SELECT EXISTS() SQL statement. | yii\db\QueryBuilder
setConditionClasses() | Setter for $conditionClasses property. | yii\db\QueryBuilder
setExpressionBuilders() | Setter for $expressionBuilders property. | yii\db\QueryBuilder
truncateTable() | Builds a SQL statement for truncating a DB table. | yii\db\sqlite\QueryBuilder
update() | Creates an UPDATE SQL statement. | yii\db\QueryBuilder
upsert() | Creates an SQL statement to insert rows into a database table if they do not already exist (matching unique constraints), or update them if they do. | yii\db\sqlite\QueryBuilder

## Protected Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
defaultConditionClasses() | Contains array of default condition classes. Extend this method, if you want to change default condition classes for the query builder. See $conditionClasses docs for details. | yii\db\QueryBuilder
defaultExpressionBuilders() | Contains array of default expression builders. Extend this method and override it, if you want to change default expression builders for this query builder. See $expressionBuilders docs for details. | yii\db\sqlite\QueryBuilder
extractAlias() | Extracts table alias if there is one or returns false | yii\db\QueryBuilder
hasLimit() | Checks to see if the given limit is effective. | yii\db\QueryBuilder
hasOffset() | Checks to see if the given offset is effective. | yii\db\QueryBuilder
prepareInsertSelectSubQuery() | Prepare select-subquery and field names for INSERT INTO . | yii\db\QueryBuilder
prepareInsertValues() | Prepares a `VALUES` part for an `INSERT` SQL statement. | yii\db\QueryBuilder
prepareUpdateSets() | Prepares a `SET` parts for an `UPDATE` SQL statement. | yii\db\QueryBuilder
prepareUpsertColumns() |  | yii\db\QueryBuilder

## Constants

Hide inherited constants

Constant | Value | Description | Defined By
--- | --- | --- | ---
PARAM_PREFIX | ':qp' | The prefix for automatically generated query binding parameters. | yii\db\QueryBuilder

## Property Details

$typeMap public property

Mapping from abstract column types (keys) to physical column types (values).

public array $typeMap = [\yii\db\sqlite\Schema::TYPE_PK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', \yii\db\sqlite\Schema::TYPE_UPK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', \yii\db\sqlite\Schema::TYPE_BIGPK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', \yii\db\sqlite\Schema::TYPE_UBIGPK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', \yii\db\sqlite\Schema::TYPE_CHAR => 'char(1)', \yii\db\sqlite\Schema::TYPE_STRING => 'varchar(255)', \yii\db\sqlite\Schema::TYPE_TEXT => 'text', \yii\db\sqlite\Schema::TYPE_TINYINT => 'tinyint', \yii\db\sqlite\Schema::TYPE_SMALLINT => 'smallint', \yii\db\sqlite\Schema::TYPE_INTEGER => 'integer', \yii\db\sqlite\Schema::TYPE_BIGINT => 'bigint', \yii\db\sqlite\Schema::TYPE_FLOAT => 'float', \yii\db\sqlite\Schema::TYPE_DOUBLE => 'double', \yii\db\sqlite\Schema::TYPE_DECIMAL => 'decimal(10,0)', \yii\db\sqlite\Schema::TYPE_DATETIME => 'datetime', \yii\db\sqlite\Schema::TYPE_TIMESTAMP => 'timestamp', \yii\db\sqlite\Schema::TYPE_TIME => 'time', \yii\db\sqlite\Schema::TYPE_DATE => 'date', \yii\db\sqlite\Schema::TYPE_BINARY => 'blob', \yii\db\sqlite\Schema::TYPE_BOOLEAN => 'boolean', \yii\db\sqlite\Schema::TYPE_MONEY => 'decimal(19,4)']

## Method Details

addCheck() public method (available since version 2.0.13)

Creates a SQL command for adding a check constraint to an existing table.

public string addCheck ( $name, $table, $expression )
$name | string | The name of the check constraint. The name will be properly quoted by the method.
$table | string | The table that the check constraint will be added to. The name will be properly quoted by the method.
$expression | string | The SQL of the `CHECK` constraint.
return | string | The SQL statement for adding a check constraint to an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

addCommentOnColumn() public method (available since version 2.0.8)

Builds a SQL command for adding comment to column.

public string addCommentOnColumn ( $table, $column, $comment )
$table | string | The table whose column is to be commented. The table name will be properly quoted by the method.
$column | string | The name of the column to be commented. The column name will be properly quoted by the method.
$comment | string | The text of the comment to be added. The comment will be properly quoted by the method.
return | string | The SQL statement for adding comment on column
throws | yii\base\NotSupportedException |

addCommentOnTable() public method (available since version 2.0.8)

Builds a SQL command for adding comment to table.

public string addCommentOnTable ( $table, $comment )
$table | string | The table whose column is to be commented. The table name will be properly quoted by the method.
$comment | string | The text of the comment to be added. The comment will be properly quoted by the method.
return | string | The SQL statement for adding comment on table
throws | yii\base\NotSupportedException |

addDefaultValue() public method (available since version 2.0.13)

Creates a SQL command for adding a default value constraint to an existing table.

public string addDefaultValue ( $name, $table, $column, $value )
$name | string | The name of the default value constraint. The name will be properly quoted by the method.
$table | string | The table that the default value constraint will be added to. The name will be properly quoted by the method.
$column | string | The name of the column to that the constraint will be added on. The name will be properly quoted by the method.
$value | mixed | Default value.
return | string | The SQL statement for adding a default value constraint to an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

addForeignKey() public method

Builds a SQL statement for adding a foreign key constraint to an existing table.

The method will properly quote the table and column names.

public string addForeignKey ( $name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null )
$name | string | The name of the foreign key constraint.
$table | string | The table that the foreign key constraint will be added to.
$columns | string|array | The name of the column to that the constraint will be added on. If there are multiple columns, separate them with commas or use an array to represent them.
$refTable | string | The table that the foreign key references to.
$refColumns | string|array | The name of the column that the foreign key references to. If there are multiple columns, separate them with commas or use an array to represent them.
$delete | string | The ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
$update | string | The ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
return | string | The SQL statement for adding a foreign key constraint to an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite

addPrimaryKey() public method

Builds a SQL statement for adding a primary key constraint to an existing table.

public string addPrimaryKey ( $name, $table, $columns )
$name | string | The name of the primary key constraint.
$table | string | The table that the primary key constraint will be added to.
$columns | string|array | Comma separated string or array of columns that the primary key will consist of.
return | string | The SQL statement for adding a primary key constraint to an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite

addUnique() public method (available since version 2.0.13)

Creates a SQL command for adding an unique constraint to an existing table.

public string addUnique ( $name, $table, $columns )
$name | string | The name of the unique constraint. The name will be properly quoted by the method.
$table | string | The table that the unique constraint will be added to. The name will be properly quoted by the method.
$columns | string|array | The name of the column to that the constraint will be added on. If there are multiple columns, separate them with commas. The name will be properly quoted by the method.
return | string | The SQL statement for adding an unique constraint to an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

alterColumn() public method

Builds a SQL statement for changing the definition of a column.

public string alterColumn ( $table, $column, $type )
$table | string | The table whose column is to be changed. The table name will be properly quoted by the method.
$column | string | The name of the column to be changed. The name will be properly quoted by the method.
$type | string | The new column type. The getColumnType() method will be invoked to convert abstract column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
return | string | The SQL statement for changing the definition of a column.
throws | yii\base\NotSupportedException | this is not supported by SQLite

batchInsert() public method

Generates a batch INSERT SQL statement.

For example,

    $connection->createCommand()->batchInsert('user', ['name', 'age'], [
        ['Tom', 30],
        ['Jane', 20],
        ['Linda', 25],
    ])->execute();

Note that the values in each row must match the corresponding column names.

public string batchInsert ( $table, $columns, $rows, &$params = [] )
$table | string | The table that new rows will be inserted into.
$columns | array | The column names
$rows | array|Generator | The rows to be batch inserted into the table
$params |  |
return | string | The batch INSERT SQL statement

build() public method

Generates a SELECT SQL statement from a yii\db\Query object.

public array build ( $query, $params = [] )
$query | yii\db\Query | The yii\db\Query object from which the SQL statement will be generated.
$params | array | The parameters to be bound to the generated SQL statement. These parameters will be included in the result with the additional parameters generated during the query building process.
return | array | The generated SQL statement (the first array element) and the corresponding parameters to be bound to the SQL statement (the second array element). The parameters returned include those provided in `$params`.

buildLimit() public method

public string buildLimit ( $limit, $offset )
$limit | integer |
$offset | integer |
return | string | The LIMIT and OFFSET clauses

buildUnion() public method

public string buildUnion ( $unions, &$params )
$unions | array |
$params | array | The binding parameters to be populated
return | string | The UNION clause built from yii\db\Query::$union.

checkIntegrity() public method

Enables or disables integrity check.

public string checkIntegrity ( $check = true, $schema = '', $table = '' )
$check | boolean | Whether to turn on or off the integrity check.
$schema | string | The schema of the tables. Meaningless for SQLite.
$table | string | The table name. Meaningless for SQLite.
return | string | The SQL statement for checking integrity
throws | yii\base\NotSupportedException | this is not supported by SQLite

createIndex() public method

Builds a SQL statement for creating a new index.

public string createIndex ( $name, $table, $columns, $unique = false )
$name | string | The name of the index. The name will be properly quoted by the method.
$table | string | The table that the new index will be created for. The table name will be properly quoted by the method.
$columns | string|array | The column(s) that should be included in the index. If there are multiple columns, separate them with commas or use an array to represent them. Each column name will be properly quoted by the method, unless a parenthesis is found in the name.
$unique | boolean | Whether to add UNIQUE constraint on the created index.
return | string | The SQL statement for creating a new index.

defaultExpressionBuilders() protected method (available since version 2.0.14)

Contains array of default expression builders. Extend this method and override it, if you want to change default expression builders for this query builder. See $expressionBuilders docs for details.

protected array defaultExpressionBuilders ( )

dropCheck() public method (available since version 2.0.13)

Creates a SQL command for dropping a check constraint.

public string dropCheck ( $name, $table )
$name | string | The name of the check constraint to be dropped. The name will be properly quoted by the method.
$table | string | The table whose check constraint is to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping a check constraint.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

dropColumn() public method

Builds a SQL statement for dropping a DB column.

public string dropColumn ( $table, $column )
$table | string | The table whose column is to be dropped. The name will be properly quoted by the method.
$column | string | The name of the column to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping a DB column.
throws | yii\base\NotSupportedException | this is not supported by SQLite

dropCommentFromColumn() public method (available since version 2.0.8)

Builds a SQL command for adding comment to column.

public string dropCommentFromColumn ( $table, $column )
$table | string | The table whose column is to be commented. The table name will be properly quoted by the method.
$column | string | The name of the column to be commented. The column name will be properly quoted by the method.
return | string | The SQL statement for adding comment on column
throws | yii\base\NotSupportedException |

dropCommentFromTable() public method (available since version 2.0.8)

Builds a SQL command for adding comment to table.

public string dropCommentFromTable ( $table )
$table | string | The table whose column is to be commented. The table name will be properly quoted by the method.
return | string | The SQL statement for adding comment on column
throws | yii\base\NotSupportedException |

dropDefaultValue() public method (available since version 2.0.13)

Creates a SQL command for dropping a default value constraint.

public string dropDefaultValue ( $name, $table )
$name | string | The name of the default value constraint to be dropped. The name will be properly quoted by the method.
$table | string | The table whose default value constraint is to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping a default value constraint.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

dropForeignKey() public method

Builds a SQL statement for dropping a foreign key constraint.

public string dropForeignKey ( $name, $table )
$name | string | The name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
$table | string | The table whose foreign is to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping a foreign key constraint.
throws | yii\base\NotSupportedException | this is not supported by SQLite

dropIndex() public method

Builds a SQL statement for dropping an index.

public string dropIndex ( $name, $table )
$name | string | The name of the index to be dropped. The name will be properly quoted by the method.
$table | string | The table whose index is to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping an index.

dropPrimaryKey() public method

Builds a SQL statement for removing a primary key constraint to an existing table.

public string dropPrimaryKey ( $name, $table )
$name | string | The name of the primary key constraint to be removed.
$table | string | The table that the primary key constraint will be removed from.
return | string | The SQL statement for removing a primary key constraint from an existing table.
throws | yii\base\NotSupportedException | this is not supported by SQLite

dropUnique() public method (available since version 2.0.13)

Creates a SQL command for dropping an unique constraint.

public string dropUnique ( $name, $table )
$name | string | The name of the unique constraint to be dropped. The name will be properly quoted by the method.
$table | string | The table whose unique constraint is to be dropped. The name will be properly quoted by the method.
return | string | The SQL statement for dropping an unique constraint.
throws | yii\base\NotSupportedException | this is not supported by SQLite.

renameColumn() public method

Builds a SQL statement for renaming a column.

public string renameColumn ( $table, $oldName, $newName )
$table | string | The table whose column is to be renamed. The name will be properly quoted by the method.
$oldName | string | The old name of the column. The name will be properly quoted by the method.
$newName | string | The new name of the column. The name will be properly quoted by the method.
return | string | The SQL statement for renaming a DB column.
throws | yii\base\NotSupportedException | this is not supported by SQLite

renameTable() public method

Builds a SQL statement for renaming a DB table.

public string renameTable ( $table, $newName )
$table | string | The table to be renamed. The name will be properly quoted by the method.
$newName | string | The new table name. The name will be properly quoted by the method.
return | string | The SQL statement for renaming a DB table.

resetSequence() public method

Creates a SQL statement for resetting the sequence value of a table's primary key.

The sequence will be reset such that the primary key of the next new row inserted will have the specified value or 1.

public string resetSequence ( $tableName, $value = null )
$tableName | string | The name of the table whose primary key sequence will be reset
$value | mixed | The value for the primary key of the next new row inserted. If this is not set, the next new row's primary key will have a value 1.
return | string | The SQL statement for resetting sequence
throws | yii\base\InvalidArgumentException | if the table does not exist or there is no sequence associated with the table.

truncateTable() public method

Builds a SQL statement for truncating a DB table.

public string truncateTable ( $table )
$table | string | The table to be truncated. The name will be properly quoted by the method.
return | string | The SQL statement for truncating a DB table.

upsert() public method (available since version 2.0.14)

Creates an SQL statement to insert rows into a database table if they do not already exist (matching unique constraints), or update them if they do.

For example,

    $sql = $queryBuilder->upsert('pages', [
        'name' => 'Front page',
        'url' => 'http://example.com/', // url is unique
        'visits' => 0,
    ], [
        'visits' => new \yii\db\Expression('visits + 1'),
    ], $params);

The method will properly escape the table and column names.

See also https://stackoverflow.com/questions/15277373/sqlite-upsert-update-or-insert/15277374#15277374.

public string upsert ( $table, $insertColumns, $updateColumns, &$params )
$table | string | The table that new rows will be inserted into/updated in.
$insertColumns | array|yii\db\Query | The column data (name => value) to be inserted into the table or instance of yii\db\Query to perform `INSERT INTO ... SELECT` SQL statement.
$updateColumns | array|boolean | The column data (name => value) to be updated if they already exist. If `true` is passed, the column data will be updated to match the insert column data. If `false` is passed, no update will be performed if the column data already exists.
$params | array | The binding parameters that will be generated by this method. They should be bound to the DB command later.
return | string | The resulting SQL.
throws | yii\base\NotSupportedException | if this is not supported by the underlying DBMS.