CLOSE--关闭游标 PREPARE--为动态执行准备SQL 语句 EXECUTE--动态地执行SQL 语句 DESCRIBE--描述准备好的查询 ---局部变量 declare@idchar(10) --set @id = '10010001' select@id='10010001' ---全局变量 ---必须以@@开头 --IF ELSE declare@xint@yint@zint select@x=1@y=2@z=3 if@x>@y print'...
SQL העתק IF 1 = 1 PRINT 'Boolean expression is true.' ELSE PRINT 'Boolean expression is false.'; The following example has a Boolean expression (1 = 2) that is false, and therefore prints the second statement.SQL העתק ...
ELSE (IF...ELSE) (Transact-SQL) ENABLE TRIGGER (Transact-SQL) ENCRYPTBYASYMKEY (Transact-SQL) ENCRYPTBYCERT (Transact-SQL) ENCRYPTBYKEY (Transact-SQL) ENCRYPTBYPASSPHRASE (Transact-SQL) END (BEGIN...END) (Transact-SQL) END CONVERSATION (Transact-SQL) ERROR_LINE (Transact-SQL) ERROR_MESSAG...
declare @x int @y int @z int select @x = 1 @y = 2 @z=3 if @x > @y print 'x > y' --打印字符串'x > y' else if @y > @z print 'y > z' else print 'z > y' --CASE use pangu update employee set e_wage = case when job_level = ’1’ then e_wage*1.08 when j...
DENY (Transact-SQL) DIFFERENCE (Transact-SQL) DISABLE TRIGGER (Transact-SQL) DROP 陳述式 (Transact-SQL) ELSE (IF...ELSE) (Transact-SQL) ENABLE TRIGGER (Transact-SQL) ENCRYPTBYASYMKEY (Transact-SQL) ENCRYPTBYCERT (Transact-SQL) ENCRYPTBYKEY (Transact-SQL) ...
Microsoft SQL Server 使用保留的關鍵字來定義、操作和存取資料庫。 保留關鍵字是 Transact-SQL 語言文法的一部分,SQL Server 使用這些關鍵字來剖析及理解 Transact-SQL 陳述式和批次。 雖然在語意上可以利用 SQL Server 保留關鍵字作為 Transact-SQL 指令碼中的識別碼及物件名稱,但您必須分隔這些識別碼。 下表列出...
SQL USEAdventureWorks2022; GOSELECTProductID, MakeFlag, FinishedGoodsFlag,NULLIF(MakeFlag,FinishedGoodsFlag)AS[NullifEqual]FROMProduction.ProductWHEREProductID <10; GOSELECTProductID, MakeFlag, FinishedGoodsFlag, [NullifEqual] =CASEWHENMakeFlag = FinishedGoodsFlagTHENNULLELSEMakeFlagENDFROMProduction.Produc...
If noinput_expression=when_expressionevaluates to TRUE, the SQL Server Database Engine returns theelse_result_expressionif an ELSE clause is specified, or a NULL value if no ELSE clause is specified. Searched CASE expression: Evaluates, in the order specified,Boolean_expressionfor each WHEN clause...
在SQL Server、Azure SQL 数据库和 Analytics Platform System (PDW) 中创建 Transact-SQL 或公共语言运行时 (CLR) 存储过程。 存储过程与其他编程语言中的过程类似,这是因为存储过程可以: 接受输入参数并以输出参数的格式向调用过程或批处理返回多个值。 包含用于在数据库中执行操作(包括调用其他过程)的编程语句。
CASE Statement when not null , else if Help Case statement with Between in Where Clause Case statement with Date Comparison CASE statement with substring CASE WHEN - Adding collate into it. Case WHEN and concatenate string CASE WHEN isnumeric(ColValue) THEN ... ELSE ... END CASE WHEN MIN,...