PostgreSQL 将 int 值与数字字段连接起来

Question

我想做这样的事情:

update cli_pe set nm_cli_espace_client = 9 || nm_cli_espace_client
 where nm_cli_pe = 7006488 

nm_cli_espace_client 是数字(0,8)。

如何让它变得简单？

Answer 1

UPDATE cli_pe
   SET nm_cli_espace_client = '9' || CAST(nm_cli_espace_client AS text)
 WHERE nm_cli_pe = 7006488;

如果您需要结果数字，请CAST返回结果:

... SET nm_cli_espace_client =
      CAST('9' || CAST(nm_cli_espace_client AS text) AS integer)

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