TSQL是一种用于管理和操作关系型数据库的编程语言,它支持使用CASE语句来更新多个列,但更新操作的结果取决于特定的值。 CASE语句是一种条件表达式,它允许根据不同的条件执行不同的操作。在TSQL中,可以使用CASE语句来更新多个列的值,具体步骤如下: 使用UPDATE语句来指定要更新的表和列。 在SET子句中,使用CASE语句来...
SqlBinaryScalarOperatorType SqlBooleanExpression SqlBooleanExpressionError SqlBooleanFilterExpression SqlBooleanOperatorType SqlBreakStatement SqlBucketCountIndexOption SqlBuiltinScalarFunctionCallExpression SqlCaseExpression SqlCastExpression SqlChangeTrackingContext SqlCheckConstraint ...
This article also discusses the following keywords that can be used on the FROM clause:JOIN APPLY PIVOTTransact-SQL syntax conventionsSyntaxSyntax for SQL Server, Azure SQL Database, and Fabric SQL database:syntaxsql Másolás [ FROM { } [ , ...n ] ] ::= { table_or_view_name [ ...
Another T-SQL enhancement in Yukon allows you to return output from Data Manipulation Language (DML) statements other than SELECT (INSERT, UPDATE, DELETE). A new OUTPUT clause allows you to request that the old/new images of the columns be returned by referring to the INSERTED and DELETED ta...
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In this tip, we will examine the integration of table data through the use of the T-SQLUNION operationalong with theINTO clause, theCAST functionand theCASE expression. The three tables I am creating all have different structures, but similar data which I will convert using CAST to ...
SQL Server returns errors when duplicate names appear in the FROM clause. table_or_view_name The name of a table or view. If the table or view exists in another database on the same instance of SQL Server, use a fully qualified name in the form database.schema.object_name. If the ...
TSqlTokenType TSqlTriggerEventGroupHelper TSqlTriggerEventTypeHelper Unaryexpression UnaryExpressionType UniqueConstraintDefinition UniqueRowFilter UnpivotedTableReference UnqualifiziertJoin UnqualifiedJoinType UpdateCall UpdateDeleteSpecificationBase UpdateForClause UpdateMergeAction UpdateSpecification UpdateStatement...
TSqlTokenType TSqlTriggerEventGroupHelper TSqlTriggerEventTypeHelper Unaryexpression UnaryExpressionType UniqueConstraintDefinition UniqueRowFilter UnpivotedTableReference UnqualifiziertJoin UnqualifiedJoinType UpdateCall UpdateDeleteSpecificationBase UpdateForClause UpdateMergeAction UpdateSpecification UpdateStatement ...