SQL Interview Questions

13. What are Table and Field in SQL?

A table in SQL will have rows and columns organized. Field refer to number of columns and records refers to number of rows in a table

14. What are Joins in SQL?

A SQL join is used to combine rows from two or more tables with related columns between them

15. What are different types of JOINS in SQL?

16. What are different types of Constraints in SQL?

Constraints are rules applied in database tables on how we perform various operation of data. Following are the types of Constraints:

  • PRIMARY KEYIt uniquely identifies each row present in a table.

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