Why Does My PostgreSQL DELETE Query Show a 'column does not exist' Error?

Solution to "column does not exist" error in PostgreSQL DELETE query

When executing a DELETE query in PostgreSQL, you may encounter a "column does not exist" error. This error is usually caused by the use of double and single quotes in the query.

The syntax of a DELETE query includes specifying the table name, followed by a WHERE clause to filter records based on conditions. For the query you provided:

<code class="language-sql">delete from "Tasks" where id = "fc1f56b5-ff41-43ed-b27c-39eac9354323";</code>

The error is because PostgreSQL interprets values ​​within quotes as identifiers (e.g. table names, column names) rather than string values. This is because the table name "Tasks" and the id value "fc1f56b5-ff41-43ed-b27c-39eac9354323" are enclosed in double quotes (").

To solve this problem, the id value should be enclosed in single quotes ('), which represents a character constant. This tells PostgreSQL that the value should be taken literally.

Corrected query:

<code class="language-sql">delete from "Tasks" where id = 'fc1f56b5-ff41-43ed-b27c-39eac9354323';</code>

By correctly using single quotes for the id value, you ensure that PostgreSQL interprets it as a string constant, thus avoiding "column does not exist" errors and successfully executing delete queries.

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