updatetable1setc1=(selectt2.c1fromtable2t2wheretable1.c2=t2.c2) 这个语句确实在sqlserver中能运行,假如你真的运行了它,你就会悲剧了。因为table1中所有的记录都被更新过,而且一部分本不需要更的记录被更新成了null,而不是像oracle中只对符合子查询的记录进行更新。sqlserver中怎么来对这种情况进行更新的呢?
在SQLSERVER中: update tmp_b set flag = b.flang from tmp_a a,tmp_b b where a.cpcode =b.cpcode and a.sb_ym = b.sb_ym; 在Oracle中: 方法一:(效率低) update tmp_b a set flag = (select flag from tmp_a b where a.cpcode = b.cpcode and a.sb_ym = b.sb_ym ) where exi...
在SQLSERVER中: update tmp_b set flag = b.flang from tmp_a a,tmp_b b where a.cpcode =b.cpcode and a.sb_ym = b.sb_ym; 在Oracle中: 方法一:(效率低) update tmp_b a set flag = (select flag from tmp_a b where a.cpcode = b.cpcode and a.sb_ym = b.sb_ym ) where exi...
反复试几次,明白了,Delete From不认表名别名!回头想下,当初程序改完后主要是在Oracle中测的,SQLServer一直没细测。 之所以要用别名,是因为where条件中需要用到子查询写一些条件,下面不写那么复杂,仅说明一下问题。 结论:(ORACLE适用) DELETE FROM TABLEA A WHERE A.FIELD1=10(SQLSERVER适用) DELETE TAB...
update 用户.base_label bl 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....
oracle 的 update语句 update PERF_DEPT_KPI asetSCORE=(select scorefrom( select sum(PDK.SCORE)score,pdk.grade,PD.SUPPER_WEIDU_ID from PERF_DEPT_KPI PDK LEFT JOIN PERF_DIMENSION PD on PDK.WEIDU_ID= PD.WEIDU_ID where PD.IS_ADD=1and PDK.PROJECT_ID=58095and PDK.GRADE=2group by PD.SUPPER...
我们先看ORACLE中UPDATE的语法,和sqlserver的语法类 单表更新 方法一: UPDATE 表名称 SET 字段1=值1,字段2=值2,...[WHERE更新条件(s)]方法二: update studentset(sname,sage,sbirthday,saddress)=(select'李四',20,to_date('2010-01-01','yyyy-mm-dd'),'广州市越秀区'fromdual)wheresid=1 ...
static class UpdateMicrosoftSqlserverConnectionDetails.Builder Field Summary Fields inherited from class com.oracle.bmc.http.client.internal.ExplicitlySetBmcModel EXPLICITLY_SET_FILTER_NAME, EXPLICITLY_SET_PROPERTY_NAME Constructor Summary Constructors Constructor and Description UpdateMicrosoftSqlser...
MySQL、SQLServer、Oracle的updateleftjoin语法mysql UPDATE A LEFT JOIN B ON A.B_ID = B.B_ID SET A.A_NAME = B.B_NAME;sqlserver update A set A_NAME = B.B_NAME from A left join B ON A.B_ID = B.B_ID sqlserver注意前⾯两个A没有别称 oracle UPDATE (SELECT a.cont AS acont FROM...
ORACLE里面需要这样才能完成上面的功能 update ( select bonus from employee_bonus b inner join employees e on b.employee_id = e.employee_id where e.bonus_eligible = 'N' ) t set t.bonus = 0 另: Update XXX set XXX where 这种写法大家肯定都知道,才发现update和delete居然支持inner join的update...