- SQL code
--oracle10gcreate table BREAKOUT( OBJECTID INTEGER not null, GJ NVARCHAR2(10), RWIDTH NUMBER(38,8), RHEIGHT NUMBER(38,8));insert into BREAKOUT (OBJECTID,GJ,Rwidth,Rheight) values (1,'500X600',0,0);insert into BREAKOUT (OBJECTID,GJ,Rwidth,Rheight) values (2,'700X600',0,0);insert into BREAKOUT (OBJECTID,GJ,Rwidth,Rheight) values (3,'300X400',0,0);insert into BREAKOUT (OBJECTID,GJ,Rwidth,Rheight) values (4,'450',0,0);insert into BREAKOUT (OBJECTID,GJ,Rwidth,Rheight) values (4,'550',0,0);select * from BREAKOUT;
我想把GJ这个字段,拆成2个数值,第一个数值放在RWIDTH里边,第二个数值放在RHEIGHT里边;而且,如果没有X的话,默认放到RWIDTH里边,请问,该怎么写UPDATE语句呢?
------解决方案--------------------
- SQL code
update BREAKOUT set RWIDTH = (case when instr(GJ, 'X') > 0 then to_number(substr(GJ, 1, instr(GJ, 'X') - 1)) else to_number(GJ) end), RHEIGHT =(case when instr(GJ, 'X') > 0 then to_number(substr(GJ, instr(GJ, 'X') + 1)) else RHEIGHT end);commit;