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  • mysql之数据初始化update操作

    1.单表的:update user set name = (select name from user where id in (select id from user where name='小苏'));

                     update goods set name = REPLACE(name ,' ','') ; //去空格

                     update goods set name = replace(name,'香蕉','苹果') ; //香蕉换苹果
                     update goods set name = price ; //将自己表中的数据赋值给另外一个属性

    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..新建表需要原表的数据(sr_main ,sr_detail ,护理人数计算)
    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..新建表需要原表的数据(sr_main_da ,sr_detail_da ,护理人数计算)
    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函数的运用

    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='许可' THEN '01' WHEN qlsx_lx='处罚' THEN '03' WHEN qlsx_lx='强制' THEN '04'
    WHEN qlsx_lx='征收' THEN '05' WHEN qlsx_lx='给付' THEN '06' WHEN qlsx_lx='裁决' THEN '07' WHEN qlsx_lx='确认' THEN '08'
    WHEN qlsx_lx='奖励' THEN '09' WHEN qlsx_lx='权力' THEN '10' WHEN qlsx_lx='服务' THEN '14'
    END ;

    6.多个字段的更新

    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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  • 原文地址:https://www.cnblogs.com/tongcc/p/12232665.html
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