Adding multiple constraints in a single table - GeeksforGeeks
Dec 17, 2020 · We can create a table with more than one constraint in its columns. Following example shows how we can define different constraints on a table. Sr_no is a Primary Key. …
sql - Add multiple constraints in one statement - Stack Overflow
Jul 6, 2014 · ALTER TABLE TITLE ADD CONSTRAINT U_TITLEID UNIQUE(TITLE_ID), primary key (TITLE_ID); add constraint C_CATEGORY CHECK(CATEGORY='DRAMA' OR …
sql - Multiple constraints on single column - Stack Overflow
Mar 16, 2013 · Use this (table level check constraint): x VARCHAR2(20), . y NUMBER(2) NOT NULL, CONSTRAINT fk_cons FOREIGN KEY(x) REFERENCES user_info(user_id), …
SQL Constraints - W3Schools
Column level constraints apply to a column, and table level constraints apply to the whole table. The following constraints are commonly used in SQL: PRIMARY KEY - A combination of a …
SQL | Constraints - GeeksforGeeks
Jan 30, 2025 · In this article, we will explain the most common SQL constraints in detail, providing clear examples and explaining how to implement them effectively. What Are SQL Constraints? …
SQL constraints - SQL Tutorial
FOREIGN KEY Constraint: A FOREIGN KEY is a key used to link two tables together. It ensures that the value in one table must match a value in another table, typically a primary key. It is …
Multiple Inline Constraints - No Column Name
Jul 21, 2017 · There is no comma separating the two constraints. This would break the inline property of these statements and SQL Server would think you’ve messed up syntax on a …
SQL Multiple constraints on a single column - Stack Overflow
Jan 23, 2022 · I am working with sql server and the table of workers. I need to add a column "Gender" and apply two constraints : check and default. So i need to check that they gender is …
SQL Constraints (With Examples) - Programiz
In a database table, we can add rules to a column known as constraints. These rules control the data that can be stored in a column. For example, if a column has NOT NULL constraint, it …
SQL - Constraints: Your Key to Data Integrity - SQL Table
SQL constraints are like the rules that keep your database 'house of cards' standing strong. They ensure that the data in your tables follows specific rules, maintaining accuracy and consistency.