-1 (--single-transaction) 明示的トランザクション発行 複数のコマンドを実行する際に、それを一つのトランザクションとして扱う。 $psql postgres-1-c"DELETE FROM foo WHERE id = 4"-c"INSERT INTO fuu VALUES (5,now()::date)"DELETE 1 ERROR: relation "fuu" does not exist LINE 1: ...
収集された統計情報は、例えば、WHERE句またはGROUP BY句にこれらの式を含むクエリを見積もる場合に役立ちます。 SELECT * FROM table_name WHEREmod(a,10)= 0 ANDmod(a,20)= 0; SELECT 1 FROM table_name GROUP BYmod(a,10),mod(a,20); ...
相関するIN句サブクエリを結合に変換できます。 EXPLAIN (costs off) SELECT * from tenk1 A WHERE hundred in (select hundred from tenk2 B where B.odd = A.odd); QUERY PLAN --- Hash Join Hash Cond: ((a.odd = b.odd) AND (a.hundred = b.hundred)) -> Seq Scan on tenk1 a ->...
do language plpgsql $$ declare nsp name; rel name; val int8; begin for nsp,rel in select nspname,relname from pg_class t2 , pg_namespace t3 where t2.relnamespace=t3.oid and t2.relkind='S' loop execute format($_$select last_value from %I.%I$_$, nsp, rel) into val; raise ...
出力には、コーディネーター上の 1 つのcount(*)クエリのために、ワーカーで実行されている複数のクエリが表示されます。 コピー NOTICE: issuing SELECT count(*) AS count FROM public.github_events_102040 github_events WHERE true DETAIL: on server citus@private-c.demo.postgres.database.azure...
UPDATE test_innodb set group_id = 2 WHERE user_id = 'testuser'; 結果: mysql> UPDATE test_innodb set group_id = 2 WHERE user_id = 'testuser'; クエリOK、影響を受ける1行 (0.03秒) 一致した行: 1変更: 1警告: 0 ...
(50) = 'postgreslogin', @pwd VARCHAR(100) = 'MyPWD#123'SELECTCONCAT('bcp ',SCHEMA_NAME(schema_id),'.',name,' in "',@Folder,name,'.dat','" -e "',@Folder,name,'.err','" -c -d ',@dbName,' -S ',@sqlInstance,' -U ',@user,' -P ',@p...
(CASE WHEN tab.positionId::text = '0050' THEN 1 ELSE 0 END) clerk_count from tab1,tab where tab.parentAccountNumber::INTEGER=tab1.parentAccountNumber::INTEGER and tab.accountNumber::INTEGER=tab1.accountNumber::INTEGER and tab.businessUnitId::INTEGER=tab1.busin...
postgres=# UPDATE tbl SET area = 4000.0 WHERE id = 1; ERROR: cannot update table "tbl" DETAIL: Column used in the publication WHERE expression is not part of the replica identity. postgres=# DELETE FROM tbl; ERROR: cannot delete from table "tbl" because it does no...
postgres=# SELECT c.oid::regclass as table_name, postgres-# greatest(age(c.relfrozenxid),age(t.relfrozenxid)) as age postgres-# FROM pg_class c postgres-# LEFT JOIN pg_class t ON c.reltoastrelid = t.oid postgres-# WHERE c.relkind IN ('r', 'm'); table_name ...