finding duplicate column values in table with sql
SELECT username, email, COUNT(*) FROM users GROUP BY username, email HAVING COUNT(*) > 1
finding duplicate column values in table with sql
SELECT username, email, COUNT(*) FROM users GROUP BY username, email HAVING COUNT(*) > 1
duplicate a column in sql
ALTER TABLE Table1 ADD SubCategory2 {Type of subcategory 1} {NULL|NOT NULL} UPDATE Table1 SET SubCategory2 = SubCategory;
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