语法规则：
SELECT * FROM tableName t WHERE 1 = 1 AND 2 = 2 AND EXISTS (SELECT * FROM tableName t2 WHERE t.id = t2.proj_id)
SELECT * FROM tableName t WHERE 1 = 1 AND 2 = 2 AND NOT EXISTS (SELECT * FROM tableName t2 WHERE t.id = t2.proj_id)
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