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Ambiguous reference

Reports columns that have identical names but belong to different tables.

Example (MySQL):

CREATE TABLE foo(id INT PRIMARY KEY); CREATE TABLE bar(id INT PRIMARY KEY); SELECT foo.id, bar.id FROM foo, bar WHERE id > 0;

The id column appears in foo and bar tables. You need to qualify the column name to make the query correct.

SELECT foo.id, bar.id FROM foo, bar WHERE foo.id > 0;

Last modified: 29 April 2024