更新数据: UPDATE table_name SET column1 = value1, column2 = value2 WHERE condition; 删除数据: DELETE FROM table_name WHERE condition; 变量声明与使用: DECLARE @MyVariable INT; SET @MyVariable = 10; SELECT @MyVariable AS MyValue; 简单的控制流语句:...
Declare@SearchTerm varchar(250); --What we're searching the DB for<br> Declare@vSQL varchar(550)=''; --Variable that will hold our dynamic queries<br> set@SearchTerm='LoadID';<br> selectname fromsys.databases whereowner_sid !=0x01; print @Dbname; set@vSQL ='use [' + @dbname +...
If a SELECT statement returns more than one row and the variable references a nonscalar expression, the variable is set to the value returned for the expression in the last row of the result set. For example, in this batch @EmpIDVariable is set to the EmployeeID value of the last row ...
项目中使用BIGINT来存放时间,以下代码用来转换时间类型和BIGINT类型 SETANSI_NULLSONGOSETQUOTED_IDENTIFIERONGO--===--Author: GGA--Create date: 2013-03-28--Description: 将时间类型转化成BIGINT,返回指定时间--到-01-01 08:00:00.000的毫秒数--===CREATEFUNCTION[dbo].[ufn_GetMSIntFormTime](@dtDATE...
"schema-qualify":"error","select-star":"error","semicolon-termination":"error","set-ansi":"error","set-nocount":"error","set-quoted-identifier":"error","set-transaction-isolation-level":"error","set-variable":"error","update-where":"error","upper-lower":"error","unicode-string":"...
为局部变量赋值,可以使用set和select。 set@variable_name=expression set一次只能给一个局部变量赋值。 select@variable_name=expression select 可以同时给一个或多个变量赋值。 若select语句中省略赋值号及后面的表达式,则可以将局部变量值显示出来,与print语句作用相同。
clstry{$sw=[diagnostics.stopwatch]::StartNew()$connectionString="Server=tcp:$SrvName,1433;Initial Catalog=$Database;Persist Security Info=False;User ID=$Username;Password=$Password;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30...
SELECT @OrderQty; Like our first SELECT statement, the T-SQL here returns a value of 26; however, the way we get there is a bit more complicated in this example. First we declare the @OrderQty variable, set its value to NULL, and then use the EXECUTE statement to call the ...
How can i select a max of column witch type is unique identifier how can i select all columns except one in sql server query How can i select the step count of a recursive CTE ? How can i set value of @variable inside with cte ? How can I treat ZERO and NULL the same in a ...
select * from ( merge into dbo.tar as t using dbo.src as s on =s.id --matched表示On子句匹配成功,加上额外的and条件,如果when子句成功,那么更新Targe表中的数据 when matched and <> then update set = --not matched表示On子句不匹配