MySQL uses the where condition to find strange results: solve

The phenomenon and background of the problem ：

I combine queries with multiple tables , Finally, it is wrapped with a table , Named query where group_status='7', But the result is group_status='9', Super weird , I've never seen anything like this , Can't explain ！

Problem related code , Do not paste screenshots

Source code ：
SELECT group_status,a12.* FROM (
SELECT CASE WHEN a11.group_id IS NOT NULL THEN a11.group_id ELSE concat(a11.cycle, a11.dept_id) END id, a11.cycle, a11.dept_id, a11.parent_id, a11.dept_name, a11.dept_long_name, a11.group_id, a11.manager, a11.do_time_begin, a11.do_time_end, a11.do_times, a11.cnt_dept, a11.cnt, a11.je, a11.cnt_gets, a11.je_gets, a11.left_full, a11.left_poor, a11.remain, a11.group_checked_je, eff_get_fp_cnt, all_get_fp_cnt,
CASE WHEN group_checked_je >= je THEN '1'
WHEN checked_cnt > 0 THEN '1'
WHEN a11.je_gets >= je THEN '7'
WHEN a11.je_gets < je THEN '8'
WHEN a11.group_id IS NULL THEN '9' END group_status,
a11.can_gets_cnt FROM (SELECT a10.cycle, a10.dept_id, a10.parent_id, a10.dept_name, a10.dept_long_name, a10.group_id, a10.manager, a10.do_time_begin, a10.do_time_end, a10.do_times, count(0) cnt_dept, sum(CASE WHEN a10.bxed0 > 0 THEN 1 ELSE 0 END) cnt, sum(a10.bxed0) je, sum(CASE WHEN a10.bxed0 > 0 AND a10.je_need = 0 THEN 1 ELSE 0 END) cnt_gets, sum(user_je_eff) je_gets, sum(CASE WHEN a10.bxed0 > 0 AND a10.je_need > 0 AND a10.user_left_fp_je >= a10.je_need THEN 1 ELSE 0 END) left_full, sum(CASE WHEN a10.bxed0 > 0 AND a10.je_need > 0 AND a10.user_left_fp_je < a10.je_need THEN 1 ELSE 0 END) left_poor, sum(CASE WHEN a10.je_need > 0 THEN 1 ELSE 0 END) remain, sum(a10.user_checked_je) group_checked_je, sum(a10.eff_get_fp_cnt) eff_get_fp_cnt, sum(a10.all_get_fp_cnt) all_get_fp_cnt, sum(a10.checked_cnt) checked_cnt, sum(a10.can_gets_cnt) can_gets_cnt FROM (SELECT a9.cycle, a9.dept_id, a9.parent_id, a9.dept_name, a9.dept_long_name, a9.user_id, a9.login_name, a9.user_name, a9.bxed, a9.bxed0, a9.group_id, a9.manager, a9.do_time_begin, a9.do_time_end, a9.do_times, a9.user_je_eff, a9.user_je_exp, a9.user_checked_je, a9.eff_get_fp_cnt, a9.all_get_fp_cnt, a9.checked_cnt, ifnull(sum(b9.jshjxx), 0) user_left_fp_je, CASE WHEN sum(b9.jshjxx) = NULL THEN 0 ELSE count(b9.id) END user_left_fp_cnt, CASE WHEN a9.bxed0 <= 0 THEN 0 WHEN a9.bxed0 > 0 AND a9.user_je_eff >= a9.bxed0 THEN 0 ELSE a9.bxed0 - a9.user_je_eff END je_need, CASE WHEN (CASE WHEN a9.bxed0 <= 0 THEN 0 WHEN a9.bxed0 > 0 AND a9.user_je_eff >= a9.bxed0 THEN 0 ELSE a9.bxed0 - a9.user_je_eff END) > 0 AND (ifnull(sum(b9.jshjxx), 0)) > 0 THEN 1 ELSE 0 END can_gets_cnt FROM (SELECT a8.cycle, a8.dept_id, a8.parent_id, a8.dept_name, a8.dept_long_name, a8.user_id, a8.login_name, a8.user_name, a8.bxed, a8.group_id, a8.manager, a8.do_time_begin, a8.do_time_end, a8.do_times, a8.bxed0, sum(CASE WHEN a8.check_status <> '-1' THEN a8.jshjxx ELSE 0 END) user_je_eff, sum(CASE WHEN a8.check_status = '-1' THEN a8.jshjxx ELSE 0 END) user_je_exp, sum(CASE WHEN a8.check_status = '1' THEN a8.jshjxx ELSE 0 END) user_checked_je, sum(CASE WHEN a8.check_status <> '-1' THEN 1 ELSE 0 END) eff_get_fp_cnt, sum(CASE WHEN a8.check_status IS NOT NULL THEN 1 ELSE 0 END) all_get_fp_cnt, sum(CASE WHEN a8.check_status IS NOT NULL AND check_status = '1' THEN 1 ELSE 0 END) checked_cnt FROM (SELECT a7.cycle, a7.dept_id, a7.parent_id, a7.dept_name, a7.dept_long_name, a7.user_id, a7.login_name, a7.user_name, a7.bxed, a7.group_id, a7.manager, a7.do_time_begin, a7.do_time_end, a7.do_times, a7.inv_id, a7.check_status, b7.jshjxx, a7.bxed0 FROM (SELECT a6.cycle, a6.dept_id, a6.parent_id, a6.dept_name, a6.dept_long_name, a6.user_id, a6.login_name, a6.user_name, a6.bxed, a6.group_id, a6.manager, a6.do_time_begin, a6.do_time_end, a6.do_times, b6.inv_id, b6.status check_status, a6.bxed0 FROM (SELECT a5.cycle, a5.dept_id, a5.parent_id, a5.dept_name, a5.dept_long_name, a5.user_id, a5.login_name, a5.user_name, a5.bxed, CASE WHEN b5.bxed0 IS NULL THEN a5.bxed WHEN b5.bxed0 = 0 THEN 0 ELSE a5.bxed END bxed0, a5.group_id, a5.manager, a5.do_time_begin, a5.do_time_end, a5.do_times, b5.id igu_id FROM (SELECT a4.cycle, a4.dept_id, a4.parent_id, a4.dept_name, a4.dept_long_name, a4.user_id, a4.login_name, a4.user_name, a4.bxed, b4.id group_id, b4.manager, b4.do_time_begin, b4.do_time_end, b4.do_times FROM (SELECT a3.cycle, a3.dept_id, a3.parent_id, a3.dept_name, a3.dept_long_name, a3.user_id, a3.login_name, a3.user_name, sum(a3.bxed) bxed FROM (SELECT a2.cycle, a2.dept_id, a2.parent_id, a2.dept_name, a2.dept_long_name, a2.user_id, a2.login_name, a2.user_name, b2.bxed FROM (SELECT a1.cycle, a1.dept_id, a1.parent_id, a1.dept_name, a1.dept_long_name, a1.user_id, a1.login_name, a1.user_name, b1.post_id FROM (SELECT '2022-01' cycle, a.dept_id, a.parent_id, a.dept_name, a.leader dept_long_name, b.user_id, b.login_name, b.user_name FROM sys_dept a LEFT JOIN sys_user AS b ON a.dept_id = b.dept_id WHERE a.status = '0' AND b.status = '0' AND a.del_flag = '0' AND b.del_flag = '0') a1 LEFT JOIN sys_user_post b1 ON a1.user_id = b1.user_id) a2 LEFT JOIN sys_post b2 ON a2.post_id = b2.post_id WHERE b2.status = '0') a3 GROUP BY a3.cycle, a3.dept_id, a3.dept_name, a3.dept_long_name, a3.user_id, a3.login_name, a3.user_name) a4 LEFT JOIN invoice_gets_group b4 ON a4.cycle = b4.cycle AND a4.dept_id = b4.dept_id) a5 LEFT JOIN invoice_gets_user b5 ON a5.group_id = b5.group_id AND a5.login_name = b5.login_name) a6 LEFT JOIN invoice_gets_user_list b6 ON a6.igu_id = b6.igu_id) a7 LEFT JOIN invoice b7 ON a7.inv_id = b7.id) a8 GROUP BY a8.cycle, a8.dept_id, a8.parent_id, a8.dept_name, a8.dept_long_name, a8.user_id, a8.login_name, a8.user_name, a8.bxed, a8.group_id, a8.manager, a8.do_time_begin, a8.do_time_end, a8.do_times, a8.bxed0) a9 LEFT JOIN invoice b9 ON a9.login_name = b9.user_name AND b9.status = '1' AND b9.kprq LIKE concat(substr('2022-01', 1, 4), '%') GROUP BY a9.cycle, a9.dept_id, a9.parent_id, a9.dept_name, a9.dept_long_name, a9.user_id, a9.login_name, a9.user_name, a9.bxed, a9.bxed0, a9.group_id, a9.manager, a9.do_time_begin, a9.do_time_end, a9.do_times, a9.user_je_eff, a9.user_je_exp) a10 GROUP BY a10.cycle, a10.dept_id, a10.parent_id, a10.dept_name, a10.dept_long_name, a10.group_id, a10.manager, a10.do_time_begin, a10.do_time_end, a10.do_times) a11
) a12
WHERE cycle = '2022-01'
AND a12.group_status = '7' ;

Operation results and error reporting contents ：

The query condition is 7, It turns out that 9

My solution ideas and tried methods

What I want to achieve

Why does this happen ？ solve

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Take the answer ：

Displayed in the first column group_status Not at all where Conditions correspond to a12. group_status Value , There should be another column behind it group_status.

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