SQL Interview Questions #131: SQL constraints types

SQL code copied to buffer

Group tasks by:

complexity

category

database

Task 131:

What constraints types exists in SQL?

MANDATORY

NOT NULL

FOREIGN KEY

UNIQUE

DATA TYPE

LENGTH

AUTO-INCREMENT

PRIMARY KEY

RANGE

CHECK

DEFAULT

INDEX

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Learning SQL: Generate, Manipulate, and Retrieve Data by Alan Beaulieu

Learning SQL: Generate, Manipulate, and Retrieve Data by Alan Beaulieu

As data floods into your company, you need to put it to work right away―and SQL is the best tool for the job. With the latest edition of this introductory guide, author Alan Beaulieu helps developers get up to speed with SQL fundamentals for writing database applications, performing administrative tasks, and generating reports. You’ll find new chapters on SQL and big data, analytic functions, and working with very large databases.