Try this exercise. Is this statement true or false?
A Primary Key allows NULL values.
Press true if you believe the statement is correct, or false otherwise.
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- SQL Mastery for Interviews
- How to Learn SQL Step by Step SQL: Select, Where, From Filtering: LIKE, IN, BETWEEN, AND, OR, NOT Joins in SQL Grouping in SQL SQL Aggregate Functions SQL Set Operators What Are Constraints in SQL? SQL Window Functions Transactions in SQL Common Table Expressions (CTE) in SQL SQL Interview Questions Normalization in SQL Best SQL Interview Practice Questions Useful SQL Commands with Examples Best SQL Projects for Beginners What Is DDL? Data Definition Language Explained SQL Window Functions Interview Questions
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