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'...
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...
Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.DacFx v160.6161.0 The statement that will be executed if the predicate evaluates true. C# 复制 public Microsoft.SqlServer.TransactSql.ScriptDom.TSqlStatement ThenStatement { get; set; } Property ...
TRANSACTION_ID bigint START: NOT NULLEND: NULL Applies to: SQL Server 2022 (16.x) and later, and Azure SQL Database.The ID of the transaction that creates (START) or invalidates (END) a row version. If the table is a ledger table, the ID references a row in the sys.database_led...
Imposes conditions on the execution of a Transact-SQL statement. The Transact-SQL statement (sql_statement) following the boolean_expression is executed if the boolean_expression evaluates to TRUE. The optional ELSE keyword is an alternate Transact-SQL statement that is executed when boolean_...
If the language specified is not valid or there are no resources installed that correspond to that language, SQL Server returns an error. To use the neutral language resources, specify 0x0 aslanguage_term. top_n_by_rank Specifies that only thenhighest ranked matches, in descending order, are...
Applies to: SQL Server 2019 (15.x) and later versions.Specifies that command_string is executed against data_source_name and results, if any, are returned to the client. data_source_name must refer to an existing EXTERNAL DATA SOURCE definition in the database. Only data sources that point...
若要显示NULLIF和CASE之间的相似性,则以下查询将计算MakeFlag和FinishedGoodsFlag列中的值是否相同。 第一个查询使用NULLIF。 第二个查询使用CASE表达式。 SQL USEAdventureWorks2022; GOSELECTProductID, MakeFlag, FinishedGoodsFlag,NULLIF(MakeFlag,FinishedGoodsFlag)AS[NullifEqual]FROMProduction.ProductWHEREProductID...
Imposes conditions on the execution of a Transact-SQL statement. The Transact-SQL statement (sql_statement) following the boolean_expression is executed if the boolean_expression evaluates to TRUE. The optional ELSE keyword is an alternate Transact-SQL statement that is executed when boolean_...