Question

我想知道SQL查询的where子句中的哪个条件失败例如，我有以下声明

SELECT * from Users where status != 'inactive'
AND ptype != 'test' AND ptype != 'test1' 
AND (p_name NOT IN ('ptest', 'ptest0', 'ptest1', 'ptest2') OR p_name IS NULL)
AND (p_m_c  NOT LIKE '%pmcestt%' 
OR (ptype LIKE 'SomeOthertest%' AND p_m_c IS NULL)
OR (TType = 'Broad' AND p_m_c IS NULL)
OR p_m_c IN ('pmctest', 'pmctest0', 'pmctest1', 'pmctest2', 'pmctest3',
'pmctest4', 'pmctest5', 'pmctest6', 'pmctest7', 'pmctest8'))

我如何知道哪种情况失败，并获得该条件？

Answer 1

如果要检查条件，则必须将WHERE子句中的条件语句移动到SELECT列表中除条件用户列之外的每个条件的CASE语句。

SELECT *,
       CASE WHEN status !='inactive' THEN 1 else 0 end as statusTag,
       CASE WHEN ptype !='test' THEN 1 ELSE 0 end as ptypeTag,
       .
       .
       CASE WHEN p_m_c IN ('pmctest', 'pmctest0', 'pmctest1', 'pmctest2', 'pmctest3',
'pmctest4', 'pmctest5', 'pmctest6', 'pmctest7', 'pmctest8') THEN 1 else 0 end as p_m_cTag

FROM Users

这将为每个表行生成列的列表，如果满足条件则指示值1，如果该特定行的条件为假，则为0。

检查复杂的sql查询语句中哪个条件失败

1 个答案: