複数カラムの内容をカンマ区切りで連結、空欄は飛ばすSQL
SELECT CONCAT_WS(',', NULLIF(`c1`,''),NULLIF(`c2`,''),NULLIF(`c3`,''),NULLIF(`c4`,''),NULLIF(`c5`...
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nfsマウントでクライアントを増やした時に「mount.nfs: requested NFS version or transport protocol is not supported」
サーバー側の設定追加 # vi /etc/sysconfig/iptables -A INPUT -p tcp --sport 2049 -s 172.168.1.1 -j ACCEPT -A...
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Mysqlでのプロシージャ更新でエラー
ALTER PROCEDURE で直そうとすると 1064 - You have an error in your SQL syntax; check the manual that corre...
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