Code Inspection: 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;
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Last modified: 25 March 2024