Why Does My PostgreSQL Query Fail with 'column Name Does Not Exist'?

Postgresql Error: Column Name Does Not Exist

In this query:

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

The error message "column "Smith" does not exist" indicates that the column name used in the LIKE clause is incorrect. The LIKE operator requires a wildcard character to be specified in the search pattern. In this case, the wildcard character is missing, which leads to the column name being interpreted literally.

To resolve the issue, use single quotes around the search pattern to specify a string literal and include a wildcard character. For example:

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

Note that the single quotes indicate a string literal, while the double quotes indicate an identifier (in this case, the column name). Using single quotes for the search pattern also allows you to use uppercase characters in the column name without the need for additional quoting.

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