左外连接+查询条件+排序的SQL写法

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SELECT DISTINCT a.*,GROUP_CONCAT(c.project_name) as projectNames 
FROM pg_contract_info a   
 
LEFT JOIN pg_contract_project b ON a.id = b.contract_id 
LEFT JOIN pg_project_info c ON b.project_id = c.id 

where 1=1  and a.contract_status in (1,2) and a.paper_contract_no LIKE 12345

GROUP BY a.id ORDER BY created_datetime DESC

说明一下：a，b，c是表的别名，a是主表。查询条件放在条件连接查询后面，多个条件用and 隔开，可以一直加and。该查询语句亲测无误。