(MS SQL Server)语句:update b set ClientName = a.name from a,b where a.id = b.id (Oralce)语句:update b set (ClientName) = (SELECT name FROM a WHERE b.id = a.id) (Mysql)语句:: UPDATE A, B SET A1 = B1, A2 = B2, A3 = B3 WHERE A.ID = B.ID update set from 语句格式...
2 set town=(select town from wwm5 where wwm5.id=wwm2.id) 3 where id=(select wwm5.id from wwm5 where wwm5.id=wwm2.id) 4 / 8 rows updated. 方法二: 与方法一道理相同,这里需要掌握EXIST的相关用法. SQL> update wwm2 set town=(select town from wwm5 where wwm5.id=wwm2.id) where...
(Oralce)语句：update b set (ClientName) = (SELECT name FROM a WHERE b.id = a.id)(Mysql)语句：: UPDATE A, B SET A1 = B1, A2 = B2, A3 = B3 WHERE A.ID = B.ID update set from 语句格式 当where和set都需要关联⼀个表进⾏查询时，整个 update执⾏时，就需要对被...
WHERE 条件; 复制代码 使用表达式更新列的值: UPDATE 表名SET 列名= 表达式 WHERE 条件; 复制代码 使用子查询更新列的值: UPDATE 表名SET 列名= (SELECT 子查询) WHERE 条件; 复制代码 更新多个表的数据: UPDATE 表1 SET 列名= (SELECT 子查询) FROM 表1 JOIN 表2 ON 条件WHERE 条件; 复制代码 注...
insert into 表名称 (字段1,字段2,...) select 字段1,字段2,... from 表名称; 删(delete) 删除指定数据的值 语法: delete from 表名称 where 表达式; 只会删除满足条件的数据 删除所有数据 delete from 表名称 ; 改(update set) 将列中的值改为一个值 语法: update 表名称 set 字段1=值1,字段2=...
DB2--update set=(select)语法总结 最常用update语法是: update 表名 set 字段=值 where 条件 当更新内容需要select结果获取,语法: update table1 set a1,a2,a3=(select b1,b2,b3 from table2 where table1.column_name=table2.column_name)
SELECT zcbh,bmbh,sum( rks ) as rks FROM YX_ZCRK INNER JOIN YX_ZCRKMX ON YX_ZCRK.ID = YX_ZCRKMX.djbh WHERE YX_ZCRK.ID = [接收ID]GROUP BY zcbh ,bmbh 把表YX_ZCRK的ID和YX_ZCRKMX的djbh一样的的数据关联 当YX_ZCRK中的ID 为[接收ID]按照 zcbh,bmbh分组汇总rks INSE...
UPDATEeSETe.DepartmentName=d.DepartmentNameFROMEmployees eJOINDepartments dONe.DepartmentID=d.DepartmentIDWHEREe.EmployeeID=@EmployeeID; 1. 2. 3. 4. 5. 代码解析: UPDATE e: 选择要更新的表的别名为e(Employees表)。 SET e.DepartmentName = d.DepartmentName: 指定要更新的字段,将Employees表中的Depart...
set bl.y =(select ob.max from (select max(obj.maxy) as maxy,bl.y,bl.label_id from 用户.base_obj obj,用户.base_label bl where obj.minx<=bl.x and bl.x <= obj.maxx and obj.miny <= bl.y and bl.y <= obj.maxy and obj.minz <= bl.z and bl.z <= obj.maxz...