Handling NULL Values in PostgreSQL - Percona Database Performance Blog
![Postgres ] 文字列と NULL は比較演算子で比較できない ( is null ) – 偏差値40プログラマー](https://hensa40.cutegirl.jp/wp-content/uploads/2016/05/hikaku-null-01.png "Postgres ] 文字列と NULL は比較演算子で比較できない ( is null ) – 偏差値40プログラマー")
Postgres ] 文字列と NULL は比較演算子で比較できない ( is null ) – 偏差値40プログラマー
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❤ 💻 PostgreSQL - find rows where column is empty string (blank) - Dirask
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