"what are constraints in sql" Code Answer's
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what are constraints in sql
Obedient Ocelot
on Jan 27, 2021
NOT NULL # Ensures a column cannot have a NULL value
UNIQUE # Ensures all values in a column are unique
PRIMARY KEY # Identifies a record in a table, is NOT NULL & UNIQUE
FOREIGN KEY # References a unique record from another table
CHECK # Ensures all column values satisfy a condition
DEFAULT # Set a default value for a column if none is entered
INDEX # Quick way of retrieving records from databaseconstraints in sql
Obedient Ocelot
on Jan 07, 2021
RULES ABOUT THE COLUMNS IN TABLE
NOT NULL # Ensures a column cannot have a NULL value
UNIQUE # Ensures all values in a column are unique
PRIMARY KEY # Identifies a record in a table, is NOT NULL & UNIQUE
FOREIGN KEY # References a unique record from another table
CHECK # Ensures all column values satisfy a condition
DEFAULT # Set a default value for a column if none is entered
INDEX # Quick way of retrieving records from databaseconstraints in sql
Kaotik
on Apr 05, 2020
# The most common constraints are
NOT NULL # Ensures a column cannot have a NULL value
UNIQUE # Ensures all values in a column are unique
PRIMARY KEY # Identifies a record in a table, is NOT NULL & UNIQUE
FOREIGN KEY # References a unique record from another table
CHECK # Ensures all column values satisfy a condition
DEFAULT # Set a default value for a column if none is entered
INDEX # Quick way of retrieving records from databaseAll those coders who are working on the TypeScript based application and are stuck on what are constraints in sql can get a collection of related answers to their query. Programmers need to enter their query on what are constraints in sql related to TypeScript code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about what are constraints in sql for the programmers working on TypeScript code while coding their module. Coders are also allowed to rectify already present answers of what are constraints in sql while working on the TypeScript language code. Developers can add up suggestions if they deem fit any other answer relating to "what are constraints in sql". Visit this developer's friendly online web community, CodeProZone, and get your queries like what are constraints in sql resolved professionally and stay updated to the latest TypeScript updates.
