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In mysql, the unique constraint is used to uniquely identify each record in a table.unique constraint on create tablethe following statement creates a unique constraint on the "id" column when the ...

Learn how to use the MYSQLi extension in PHP to create a MYSQL table with correct data types and constraints for data architecture. Discover the common data types and constraints in MYSQL and how ...

I am trying to create to 2 tables and inserting data into them but I am getting this error Creating Athlete the table failed SQLSTATE [23000]: Integrity constraint violation: 1217 Cannot delete or ...

Looking to use an open source general-purpose database? This extensive comparison of MySQL vs. PostgreSQL explores the strengths and weaknesses of each.