sql中sum()函數與case()函數的使用


 

SELECT c.LSMC,b.wtj,b.dbl,b.th,b.ysh,b.ysa,b.yla FROM
(SELECT SQRSFZ
,SUM(CASE clzt WHEN 0 THEN 1 ELSE 0 END) AS wtj
,SUM(CASE clzt WHEN 1 THEN 1 ELSE 0 END) AS dbl
,SUM(CASE clzt WHEN 2 THEN 1 ELSE 0 END) AS th
,SUM(CASE clzt WHEN 3 THEN 1 ELSE 0 END) AS ysh
,SUM(CASE clzt WHEN 4 THEN 1 ELSE 0 END) AS ysa
,SUM(CASE clzt WHEN 5 THEN 1 ELSE 0 END)AS yla
FROM t_bmxt_sa_jbxx WHERE isDel=0 AND SQRSFZ IN
(SELECT a.SFZJHM FROM t_bmxt_lawyer a WHERE parentId='12222222222222') GROUP BY SQRSFZ)b
JOIN t_bmxt_lawyer c ON b.SQRSFZ=c.SFZJHM

結果如下


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