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Computer Science

When would you usually specify primary key constraints? Can you specify them after creating a table? How?

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter4: Constraints

Section: Chapter Questions

Problem 4MC: What is the maximum number of PRIMARY KEY constraints allowed for a table? a. 1 b. 2 c. 30 d. 255

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Concept explainers

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.

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