使用類似的查詢來獲得所需的輸出跨兩個表

Question

大家好我試圖實現下面的查詢返回兩個表基於給定的條件的結果。如何把正確的查詢到達預期的輸出？

SELECT * FROM bw_tempclientdetails 
where companyname like '%fff%' 
not in (SELECT * FROM bw_clientallocation where companyname like '%fff%'); 

Answer 1

使用join < --follow鏈接

SELECT * 
    FROM bw_tempclientdetails bw_temp 
    LEFT JOIN bw_clientallocation bw_client 
    ON bw_temp.companyname = bw_client.companyname -- this is just an identifier or link between the tables 
WHERE bw_client.company LIKE '%fff%' 
    AND (bw_temp.companyname LIKE '%fff%' AND bw_client.company LIKE '%fff%'); 

希望它能幫助。祝你好運。

Answer 2

select t1.* from (
SELECT * FROM bw_tempclientdetails 
where companyname like '%fff%') as t1 
left join (SELECT * FROM bw_clientallocation where companyname like '%fff%') as t2 
on t1.companyname = t2.companyname 
where t2.companyname is null 

Answer 3

SELECT * FROM bw_tempclientdetails 
where companyname like '%fff%' and companyname 
not in (SELECT companyname FROM bw_clientallocation where companyname like '%fff%');