ProductID is the primary key column for the relation below. Which column violates a rule (characteristic) of a relation? Product Relation Name Cost ProductID Hammer 19.99 100 20 pack washers 6.75 200 Tape 3.19 300 1 gal paint 24.99 400 Group of answer choices The Cost column because it is out of order. The columns must be in alphabetical order. All the columns are valid. None of the columns are valid. The ProductID column. It is the primary key column and must be first.

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SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.