WHERE atest.CODE IN (SELECT BTEST.CODE FROM BTEST); 1. declare cursor t1 is select * from tablename; begin for rec in t1 loop update tablename t set t.detail=rec.jieshao where t.objectid=rec.objid; end loop; end
结论 DB2中的select...for update 如果是动态SQL,只有显式指定RR或RS隔离级别时,才会产生U锁。U锁和S锁兼容,与U锁不兼容。Update之后U锁变为X锁。 如果是静态SQL,定义了游标cursor之后,即使没有显式指定RR或RS隔离级别,为默认的CS隔离级别时,当fetch游标数据时会产生U锁。 问题现象复合第二种情况,同一笔数...
DECLARE C1 CURSOR FOR SELECT BONUS FROM DSN8710.EMP WHERE WORKDEPT = 'E12' FOR UPDATE OF BONUS; EXEC SQL UPDATE DSN8710.EMP SET BONUS = ( SELECT .10 * SALARY FROM DSN8710.EMP Y WHERE EMPNO = Y.EMPNO ) WHERE CURRENT OF C1; カーソル CS1 が、表 T1 の 10 行からなる行セットに...
ThepositionedUPDATE form specifies that one or more rows corresponding to the current cursor position are to be updated. Invocation forUPDATE This statement can be embedded in an application program or issued interactively. A positioned UPDATE can be embedded in an application program. Both forms are...
cursor t1 is select * from tablename; begin for rec in t1 loop update tablename t set t.detail=rec.jieshao where t.objectid=rec.objid; end loop; end; 2. update student set (name,id )= (select name ,id from (select student.rowid rd,student1.name,student1.id from student1,student...
BizTalk Adapter for DB2 processes Receive Location UPDATE or DELETE on SELECT or CALL statements against DB2 for i by using NO COMMIT isolation level instead of CURSOR STABILITY isolation level. This results in no changes committed...
conn2 = pymysql.connect(host='host2', user='user2', password='password2', database='db2') cursor2 = conn2.cursor() 1. 2. 3. 4. 5. 6. 7. 8. 9. ### 3. 执行update操作 最后,我们可以在数据库1中执行update操作,同时跨库where条件在数据库2中查找相关数据,然后更新数据库1中的数据...
[WHERE condition | WHERE current of cursor_name]; 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。 实例: UPDATE table1 t1 SET column1 = t2.columnname1 column2 = t2.columnname2 FROM (select columnname1,columnname2 from table2) t2 ...
The cfpm cursor will reappear when the download is complete. Verify that the directory C:/ColdFusion2023/bundles indeed contains the downloaded packages. Edit /lib/neo-updates.xml and make sure it contains the following: <packagesurl>file:///C...
The cfpm cursor will reappear when the download is complete. Verify that the directory D:/ColdFusion2021/bundles indeed contains the downloaded packages. Edit /lib/neo-updates.xml and make sure it contains the following: <packagesurl>file:///D:/ColdFusion2021/bundles/bundlesdepe...