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alter table tmp 1 add index a1 (school_id); alter table tmp2 add index a1 (geo_code); DROP table if EXISTS m_v3; Create table m_v3 AS select a.school_id, a.name, a.adreess b.geo_code, b.sco_code, CASE when sco_code is not null then 'Y' else 'N' end as check_code FROM tmp1 a left join tmp2 b ON a.school_id = b.geo_code GROUP BY 1,2;
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