How can we change the column datatype in PostgreSQL?
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- How can the JSONB data type in PostgreSQL enhance query performance compared to the regular JSON type?How do you add a column to an existing table in MySQL? a. MODIFY TABLE table_name ADD COLUMN new_column CHAR(3); b. MODIFY TABLE table_name ADD new_column CHAR(3); c. ALTER TABLE table_name ADD new_column CHAR(3); d. ALTER TABLE table_name ADD COLUMN new_column CHAR(3);I tried using this and it gives me (Error Code: 1052. Column 'AU_ID' in field list is ambiguous) could you provide fix and explain why MySQL does this?