sql server UPDATE SET 根据查询结果设置value 在SQL Server 中使用 UPDATE SET 根据查询结果更新值 在数据库开发中,当你需要根据某些条件更新表中的记录时,SQL Server 提供了强大的UPDATE...SET语句以及子查询功能。本文将为你详细讲解如何利用查询结果来设置值,并通过表格和序列图的形式帮助你理清思路。 处理流程 ...
1、通用update 一般简单的update语法比较通用 UPDATE table_name SET column1=value1, column2=value2, ... WHERE some_column= some_value; 注:若不加where条件则是更新表中的所有数据, 故执行没有where子句的update要慎重再慎重。 UPDATE subject SET name='数学', type='理学'WHERE id=1; 2、GreenPlum ...
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...); 添加新记录 假设我们要向Employees表中添加一个新员工,名叫 Alice,职位是 Analyst,薪资是 50000。 INSERT INTO Employees (EmployeeID, Name, Position, Salary) VALUES (4, 'Alice', 'Analyst', 500...
ID Value --- --- 1 100 2 200 (2 row(s) affected) 使用不正确匹配的 CTE 引用的 UPDATE 语句。 SQL 复制 USE tempdb; GO DECLARE @x TABLE (ID INT, Value INT); DECLARE @y TABLE (ID INT, Value INT); INSERT @x VALUES (1, 10), (2, 20); INSERT @y VALUES (1, 100),(2...
(1,'FirstVal') INSERT TestTable (ID, TEXTVal) VALUES (2,'SecondVal') UPDATE TestTable SET TEXTVal = 'NewValue' OUTPUT Inserted.ID, Inserted.TEXTVal, Deleted.ID, Deleted.TEXTVal INTO @TmpTable WHERE ID IN (1,2) SELECT * FROM @TmpTable SELECT * FROM TestTable DROP TABLE TestTable...
ID Value --- --- 1 100 2 200 (2 row(s) affected) CTE 參考未正確相符的 UPDATE 陳述式。 SQL 複製 USE tempdb; GO DECLARE @x TABLE (ID INT, Value INT); DECLARE @y TABLE (ID INT, Value INT); INSERT @x VALUES (1, 10), (2, 20); INSERT @y VALUES (1, 100),(2, 200...
ID Value --- --- 1 100 2 200 (2 row(s) affected) 使用不正确匹配的 CTE 引用的 UPDATE 语句。 SQL 复制 USE tempdb; GO DECLARE @x TABLE (ID INT, Value INT); DECLARE @y TABLE (ID INT, Value INT); INSERT @x VALUES (1, 10), (2, 20); INSERT @y VALUES (1, 100),(2...
- CUs may contain added value over and above hotfixes. This includes supportability, manageability, and reliability updates. We recommend that you test SQL Server CUs before you deploy them to production environments. Pacemaker notice IMPORTANT All distributions (including RHEL 7.3 and 7.4) that ...
ID Value --- --- 1 100 2 200 (2 row(s) affected) 使用不正确匹配的 CTE 引用的 UPDATE 语句。SQL 复制 USE tempdb; GO DECLARE @x TABLE (ID INT, Value INT); DECLARE @y TABLE (ID INT, Value INT); INSERT @x VALUES (1, 10), (2, 20); INSERT @y VALUES (1, 100),(2, 20...
- CUs may contain added value over and above hotfixes. This includes supportability, manageability, and reliability updates. We recommend that you test SQL Server CUs before you deploy them to production environments. Pacemaker notice IMPORTANT All distributions (including RHEL 7.3 and 7.4) that ...