Like %% 相当于没有这个like 条件
select * from a where a.id = '1' 和
select * from a where a.id = '1' and a.name like '%%' 相同。
实际例子:
SELECT *
FROM a
WHERE (a.31 LIKE '%'||Code||'%')
AND ((a.40 LIKE '%'||Name||'%' )
OR (Name IS NULL AND a.40 IS NULL))
select * from a where a.id = '1' 和
select * from a where a.id = '1' and a.name like '%%' 相同。
实际例子:
SELECT *
FROM a
WHERE (a.31 LIKE '%'||Code||'%')
AND ((a.40 LIKE '%'||Name||'%' )
OR (Name IS NULL AND a.40 IS NULL))