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ÔÙ̸ Sql Á½ÐбäÒ»ÐРʵÀý

ÒªÇó£º °´ lct1£¬ lct2  ÅÅÐòºóµÄǰÁ½Ìõ¼Í¼£¬ÏÔʾΪÏÂÁнá¹û£º
item_cd1   item_cd2            lct
01             a                 A01-3  B01-1
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IF EXISTS (SELECT TABLE_NAME from INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'm_lct_service')
DROP TABLE m_lct_service
GO
CREATE TABLE m_lct_service (
 item_cd1 nvarchar(5)  NOT NULL 
 ,item_cd2 nvarchar(10)  NOT NULL 
 ,seq_no  int   NOT NULL 
 ,lct1  nvarchar(3)  NOT NULL 
 ,lct2  nvarchar(3)  NOT NULL 
 ,stk_qty numeric(15,4) 
 ,ins_emp_cd nvarchar(4)  NOT NULL 
 ,ins_date datetime  NOT NULL 
 ,upd_emp_cd nvarchar(4)  NOT NULL 
 ,upd_date datetime  NOT NULL 
 ,CONSTRAINT pk_m_lct_service PRIMARY KEY (
    item_cd1
    ,item_cd2
    ,seq_no
    ,lct1
    ,lct2
    )
)
GO
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item_cd1 item_cd2 seq_no lct1 lct2 stk_qty ins_emp_cd ins_date upd_emp_cd upd_date
01 a 1 A01 3 20.0000 fan 2010-01-02 00:00:00.000 fan 2010-01-02 00:00:00.000
01 a 2 B01 1 20.0000 fan 2010-01-02 00:00:00.000 fan 2010-01-02 00:00:00.000
01 a 3 B01 4 20.0000 fan 2010-01-02 00:00:00.000 fan 2010-01-02 00:00:00.000
ʵ¼ÊSql:
select item_cd1,item_cd2,
case  when (AA <> BB)
then AA + ' ' + BB
else AA
end as lct
from(
select item_cd1,item_cd2,min(lct) as AA,


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