Postgres Unique Constraint On Two Columns

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Postgres Unique Constraint On Two Columns

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Array Postgres UNIQUE CONSTRAINT For Array YouTube

PostgreSQL PostgreSQL pg ident conf 3 ident 这个还是比较多的， 瀚高 、高斯、 TBase 等，还有一些云数据库，另外还有一些数据库平台直接兼容postgresql，详细可以参考这篇文章：

13 How To Use UNIQUE Constraint On Columns In SQL L UNIQUE Constraint L

Postgres Unique Constraint On Two Columnsmysql和postgres的早期完全是两个极端。 mysql更像是个“基本上满足关系数据库语法的大号KV”，对关系型数据库的高级功能支持的很不好。 我入行时接触的MySQL 5.1和MyISAM存储 … PostgreSQL postgres fdw SQL

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