sql case when

使用sql case when 统计

SELECT XiaoQu ,count(1) errorTotal,sum(CASE WHEN ErrorState='new' THEN 1 ELSE 0 end) AS newError,

sum(CASE WHEN ErrorState='finish' THEN 1 ELSE 0 end) AS finish,sum(CASE WHEN ErrorState='discard' THEN 1 ELSE 0 end) AS discard

FROM [sam].[sam_errorList]

GROUP BY XiaoQu;

SELECT t2.error_type, sum(CASE WHEN t1.ErrorState='new' THEN 1 ELSE 0 end) AS newError,

sum(CASE WHEN t1.ErrorState='finish' THEN 1 ELSE 0 end) AS finish,sum(CASE WHEN t1.ErrorState='discard' THEN 1 ELSE 0 end) AS discard

FROM [sam].[sam_errorList] t1,sam.sam_errorType t2

WHERE t1.ErrorID = t2.hid and XiaoQu = '鑫馨家园'

GROUP BY t2.error_type;