|
|||||||||
SQL の変更点
* postgres [#e092ed8c]
** select [#pbce5c5e]
select * from [table] where [colomn] is null;
select * from [table] where [colomn] is not null;
select * from [table] where [colomn] like '%hoge%';
select * from [table] where [colomn] not like '%hoge%';
** 重複削除 [#df759b04]
delete from 【TABLE】 where 【ID】 in
(select 【ID】
from 【TABLE】 S1
where 【ID】< (select MAX(【ID】) from 【table】 as S2 where
S1.key1=S2.key1 and S1.key2=S2.key2 ..... ) ) ;
* psql 編 [#s35635dc]
*** psql [#pa3a5376]
psql [-h 【hostname】] -d 【dbname】
*** backup [#n8e33415]
pg_dump 【dbname】 > dbname.dump
*** 復活 [#pce621dd]
psql -d 【dbname】 -f dbname.dump
*** 重複検索 [#l38dd420]
select min(id) from item group by time having count(*) > 1
|
|||||||||