Occur within the body of a CREATE TRIGGER statement.
#Sqlite update column update#
The following additional syntax restrictions apply to UPDATE statements that Restrictions on UPDATE Statements Within CREATE TRIGGER Refer to the section entitled ON CONFLICT for additional information.Ģ.1. UPDATE keyword allows the user to nominate a specificĬonstraint conflict resolution algorithm to use during this one UPDATE command. The optional "OR action" conflict clause that follows the Parenthesized list of column names on the left and a Scalar expressions are evaluated before any assignments are made.īeginning in SQLite version 3.15.0 (), an assignment in The scalarĮxpressions may refer to columns of the row being updated. That do not appear in the list of assignments are left unmodified. If a single column-name appears more than once in the list ofĪssignment expressions, all but the rightmost occurrence is ignored. EachĪssignment specifies a column-name to the left of theĮquals sign and a scalar expression to the right.Īre set to the values found by evaluating the corresponding scalarĮxpressions. The modifications made to each row affected by an UPDATE statement areĭetermined by the list of assignments following the SET keyword. Means that the UPDATE statement affects zero rows.
WHERE clause does not evaluate to true for any row in the table - this just Otherwise, the UPDATE affects only thoseīoolean expression is true. If the UPDATE statement does not have a WHERE clause, all rows in the Qualified-table-name specified as part of the UPDATE statement. Zero or more rows of the database table identified by the GROUPS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING RANGE ROWS UNBOUNDED PRECEDING expr PRECEDING CURRENT ROW expr PRECEDING CURRENT ROW expr FOLLOWING expr PRECEDING CURRENT ROW expr FOLLOWING EXCLUDE CURRENT ROW EXCLUDE GROUP EXCLUDE TIES EXCLUDE NO OTHERSĪn UPDATE statement is used to modify a subset of the values stored in
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