1.單錶的：update user set name = (select name from user where id in (select id from user where name='小蘇'))；
update goods set name = replace(name ,' ','') ; //去空格
update goods set name = replace(name,'香蕉','蘋果') ; //香蕉換蘋果
update goods set name = price ; //將自己表中的資料賦值給另外乙個屬性
2..update sr_main_ww a set sys_tjzt = 4 where exists (select 1 from sr_main b where a.fk_pk_sr_main = b.pk_sr_main and b.sys_spzt = 1);
exists 用法
3..新建表需要原表的資料（sr_main ，sr_detail ，護理人數計算）
update sr_main a set a.main_xm_nam05 =
(select count(1)
from sr_detail b
where a.pk_sr_main = b.fk_sr_main
and b.detail_bz_sad06 in ('1','2','3')
)where a.mdjlx = 'wb_jz';
4..新建表需要原表的資料（sr_main_da ，sr_detail_da ，護理人數計算）
update sr_main_da a
set a.main_xm_nam05 = (
select
count(1)
from
sr_detail_da b
where
a.sjbfyzj = b.fk_sr_main
and a.sjbfnf = b.sjbfnf
and a.sjbfyf = b.sjbfyf
and a.sjbfnf = '2019'
and a.sjbfyf = '11'
and a.mdjlx = 'wb_jz'
and detail_bz_sad06 in ('1', '2', '3')
)where
a.mdjlx = 'wb_jz'
and a.sjbfnf = '2019'
and a.sjbfyf = '11'
5.right，left函式的運用
更新qlsx_bgqx,永久
-----update ycs_qlsx set qlsx_bgqx='永久';
更新qlsx_bm,需要-
-----update ycs_qlsx set qlsx_bm=(right(qlsxjbm, 9));
更新qlsx_lx
-----update ycs_qlsx set qlsx_lx=(left(qlsxjbm, 2));
-----update ycs_qlsx set qlsx_lx = case when qlsx_lx='許可' then '01' when qlsx_lx='處罰' then '03' when qlsx_lx='強制' then '04'
when qlsx_lx='徵收' then '05' when qlsx_lx='給付' then '06' when qlsx_lx='裁決' then '07' when qlsx_lx='確認' then '08'
when qlsx_lx='獎勵' then '09' when qlsx_lx='權力' then '10' when qlsx_lx='服務' then '14'
end ;
6.多個欄位的更新
update sr_zjff_main_btff
set zzhs = (
select
count(1)
from
sr_main_da_btff
where
fk_sr_zjff_main = ?
and sys_spzt = 1
and sys_scbj = 0
),zzrs = (
select
sum(mxsrs)
from
sr_main_da_btff
where
fk_sr_zjff_main = ?
and sys_spzt = 1
and sys_scbj = 0
),zzje = (
select
sum(btffje)
from
sr_main_da_btff
where
fk_sr_zjff_main = ?
and sys_spzt = 1
and sys_scbj = 0
)where
pk_sr_zjff_main_btff = ?
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