1. The following SQL contains PRIMARY KEY and UNIQUE constraints. What is the difference between these two constraints? CREATE TABLE Staff Staff ld int PRIMARY KEY, LastName varchar(255) NOT NULL,...

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1. The following SQL contains PRIMARY KEY and UNIQUE constraints. What is the difference<br>between these two constraints?<br>CREATE TABLE Staff<br>Staff ld int PRIMARY KEY,<br>LastName varchar(255) NOT NULL,<br>FirstName varchar(255),<br>Address varchar(255),<br>City varchar(255),<br>emelAdd varchar(20) UNIQUE<br>

Extracted text: 1. The following SQL contains PRIMARY KEY and UNIQUE constraints. What is the difference between these two constraints? CREATE TABLE Staff Staff ld int PRIMARY KEY, LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), City varchar(255), emelAdd varchar(20) UNIQUE

Jun 10, 2022

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1. The following SQL contains PRIMARY KEY and UNIQUE constraints. What is the difference between these two constraints? CREATE TABLE Staff Staff ld int PRIMARY KEY, LastName varchar(255) NOT NULL,...

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