简单的 Postgresql 语句 - 列名不存在 [英] Simple Postgresql Statement - column name does not exists

问题描述

我一直在拔头发.我有一个非常简单的 postgre 数据库，一个特定的表有一个名为 lName(大写 N)的列.现在我知道使用 postgre 我必须引用 lName 因为它包含一个大写的 N.

I've been pulling my hair out. I have a very simple postgre database, one specific table has a column named lName (uppercase N). Now I know with postgre I must quote lName since it contains an uppercase N.

我正在尝试使用以下语句查询数据库:

I am trying to query the database with the following statement:

SELECT * 
FROM employee 
WHERE "lName" LIKE "Smith"

但我收到此错误:

警告:pg_query()[function.pg-query]:查询失败:错误:史密斯"列不存在在……

Warning: pg_query() [function.pg-query]: Query failed: ERROR: column "Smith" does not exist in .....

这里有什么问题?为什么说该列是史密斯"?

What is the issue here? Why is it saying the column is "Smith"?

推荐答案

我猜:

 SELECT * FROM employee WHERE "lName" LIKE 'Smith'

(注意不同的引号；"foo" 是带引号的标识符；'foo' 是字符串文字)

(note the different quotes; "foo" is a quoted identifier; 'foo' is a string literal)

此外，在大多数 SQL 方言中，没有通配符的 LIKE 等价于 =；您的意思是要包含通配符吗?

Also, in most SQL dialects, a LIKE without a wildcard is equivalent to =; did you mean to include a wildcard?

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