create table table_name (name char(20), age smallint, lname varchar(30)) insert into table_name select ... --- 实现删除列的方法(创建新表) alter table table_name drop constraint Stockname_default --- 删除Stockname的default约束 ***function(/*常用函数*/)*** ---统计函数--- AVG --...
Table-Valued Functions: --INLINE Table-Valued Functions, returns a result set, like a viewCREATE FUNCTION fnGetStusByScore(@score int) RETURNS TABLEAS RETURN SELECT * FROM UserDavid WHERE score = @score SELECT * FROM fnGetStusByScore(61) Multi-Statement Table-Valued Functions: -- Multi-Stat...
摘要:直接上代码:--获取往前推的N个半年度CREATE FUNCTION F3_GetRecentNHalfYear( @N INT)RETURNS @Result TABLE ( Year SMALLINT, HalfYear TINYINT, DateName VARCHAR... 阅读全文 posted @ 2015-12-24 16:49 mcjeremy 阅读(1111) 评论(0) 推荐(1) 【转】SQL FOR XML简介及用法 摘要:摘要:sql中...
SQL Server에서 NOT NULL 특성을 CREATE TABLE 문에 있는 열에 추가합니다. WHERE 절의 Null 값 테스트 IS NULL 및 IS NOT NULL 비교 조건 사용: Access에서 IS NULL 또는 IS NOT NULL을 사용합니다. 예: SELECT …...
createfunctionMakeDate(@InputDatedatetime)returns datetimeasbeginreturncast(convert(varchar,@InputDate,102)asdatetime);end 然后你就可以使用同伴的功能 Select*fromOrderswheredbo.MakeDate(OrderDate)=dbo.MakeDate(DeliveryDate) 关于时区,这是将所有日期存储在一个时区(最好是 UTC)中的另一个原因。无论如何,我...
In SQL Server, add the NOT NULL attribute to a column in a CREATE TABLE statement. Test for null values in a WHERE clause Use the IS NULL and IS NOT NULL comparison predicates: In Access, use IS NULL or IS NOT NULL. For example: ...
CREATE FUNCTION [SQL#].[String_SplitOrdered](@StringValue [nvarchar](max), @Separator [nvarchar](4000), @SplitOption [int]) RETURNS TABLE ( [SplitNum] [int] NULL, [SplitVal] [nvarchar](max) NULL ) WITH EXECUTE AS CALLER ORDER ([SplitNum] ASC) ...
Create FUNCTION [dbo].[NewTest1](@city [int], @level [int], @age1 [int], @age2 [int], @extra [bit]) RETURNS [dbo].[Test1] WITH EXECUTE AS CALLER AS EXTERNAL NAME [MyTestAsm].[MyTestNameSpace.Test1].[NewTest1] go --*** create table SET ...
1、先从建表开始吧: use ss create table lxp_table ( coll1 char(50) not null, coll2 int, coll3 int identity(1, 1) not null 自动增长1 primary key (coll3) /*建立主键*/ ) create table lxp_ 数据库 语句 null TSQL语句 TSQL
Execution Engine: Executes the query per the instrucctions set out by compilation. Our customer has the following script: CREATETableAcademy_BlobData(IDINTIDENTITY(1,1)PRIMARYKEY,AgeINT,CustomerData NVARCHAR(MAX))DECLARE@TimesInteger=0WHILE(@Times<=100000)beginS...