SQL Data Types for MySQL, SQL Server, and MS Access - W3Schools
The data type is a guideline for SQL to understand what type of data is expected inside of each column, and it also identifies how SQL will interact with the stored data. Note: Data types …
MySQL Data Types - W3Schools
The data type is a guideline for SQL to understand what type of data is expected inside of each column, and it also identifies how SQL will interact with the stored data. In MySQL there are …
SQL Tutorial - W3Schools
SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, …
Date Functions in SQL Server and MySQL - W3Schools
SQL Server comes with the following data types for storing a date or a date/time value in the database: DATE - format YYYY-MM-DD; DATETIME - format: YYYY-MM-DD HH:MI:SS; …
SQL ALTER TABLE Statement - W3Schools
SQL ALTER TABLE Statement. The ALTER TABLE statement is used to add, delete, or modify columns in an existing table. The ALTER TABLE statement is also used to add and drop …
Introduction to SQL - W3Schools
What is SQL? SQL stands for Structured Query Language; SQL lets you access and manipulate databases; SQL became a standard of the American National Standards Institute (ANSI) in …
SQL Keywords Reference - W3Schools
BACKUP DATABASE: Creates a back up of an existing database: BETWEEN: Selects values within a given range: CASE: Creates different outputs based on conditions: CHECK: A …
PostgreSQL ALTER COLUMN - W3Schools
To change the data type, or the size of a table column we have to use the ALTER TABLE statement. The ALTER TABLE statement is used to add, delete, or modify columns in an …
MySQL SQL - W3Schools
Some of The Most Important SQL Commands. SELECT - extracts data from a database; UPDATE - updates data in a database; DELETE - deletes data from a database; INSERT …
MySQL CREATE TABLE Statement - W3Schools
The datatype parameter specifies the type of data the column can hold (e.g. varchar, integer, date, etc.). Tip: For an overview of the available data types, go to our complete Data Types …