SQL Server 2008 新增T-SQL 简写语法

最新推荐文章于 2025-08-15 09:00:49 发布

转载最新推荐文章于 2025-08-15 09:00:49 发布 · 238 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：https://yq.aliyun.com/articles/365720

文章标签：

#数据库

本文介绍使用SQL语句进行变量声明与赋值、批量插入数据及数据更新的方法。通过示例展示了如何声明并初始化变量，一次性插入多行记录，并使用复合赋值操作符更新数据。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1.定义变量时可以直接赋值

DECLARE @Id int = 5

2.Insert 语句可以一次插入多行数据

INSERT INTO StateList VALUES(@Id, 'WA'), (@Id + 1, 'FL'), (@Id + 2, 'NY')

3.支持+=操作符

SET StateId += 1

完整示例如下：

view plaincopy to clipboardprint?CREATE TABLE StateList(StateId int, StateName char(2)) GO -- Declare variable and assign a value in a single statement DECLARE @Id int = 5 -- Insert multiple rows in a single statement with IDs 5, 6, and 7 INSERT INTO StateList VALUES(@Id, 'WA'), (@Id + 1, 'FL'), (@Id + 2, 'NY') -- Use compound assignment operator to increment ID values to 6, 7, and 8 UPDATE StateList SET StateId += 1 -- View the results SELECT * FROM StateList CREATE TABLE StateList(StateId int, StateName char(2))
GO

-- Declare variable and assign a value in a single statement
DECLARE @Id int = 5

-- Insert multiple rows in a single statement with IDs 5, 6, and 7
INSERT INTO StateList VALUES(@Id, 'WA'), (@Id + 1, 'FL'), (@Id + 2, 'NY')

-- Use compound assignment operator to increment ID values to 6, 7, and 8
UPDATE StateList
SET StateId += 1

-- View the results
SELECT * FROM StateList 结果集为：

StateId StateName
------- ---------
6 WA
7 FL
8 NY

(3 row(s) affected)

本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/archive/2010/03/05/1678886.html，如需转载请自行联系原作者