SQL Syntax Examples: Difference between revisions
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A list of SQL statements to serve as examples of syntax. | |||
== Primary Commands == | |||
* SELECT - extracts data from a database | |||
* UPDATE - updates data in a database | |||
* DELETE - deletes data from a database | |||
* INSERT INTO - inserts new data into a database | |||
* CREATE DATABASE - creates a new database | |||
* ALTER DATABASE - modifies a database | |||
* CREATE TABLE - creates a new table | |||
* ALTER TABLE - modifies a table | |||
* DROP TABLE - deletes a table | |||
* CREATE INDEX - creates an index (search key) | |||
* DROP INDEX - deletes an index | |||
== Examples == | == Examples == | ||
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# DESCRIBE TABLE customer; | # DESCRIBE TABLE customer; | ||
# SELECT usertable.UserName, Posts.PostID FROM usertable LEFT JOIN Posts ON usertable.UserID = Posts.UserID ORDER BY usertable.UserName; | # SELECT usertable.UserName, Posts.PostID FROM usertable LEFT JOIN Posts ON usertable.UserID = Posts.UserID ORDER BY usertable.UserName; | ||
# SELECT DISTINCT Name FROM forumusers; | |||
== Other Pages with SQL Examples == | == Other Pages with SQL Examples == | ||
* [[Krissy's MySQL Command Reference with Examples]] | * <big>[[Krissy's MySQL Command Reference with Examples]]</big> | ||
* [[More MySQL Examples]] | * <big>[[More MySQL Examples]]</big> | ||
* [[Create Table Examples for MySQL]] | * [[Create Table Examples for MySQL]] | ||
* [[MySQL database Access and Users]] | * [[MySQL database Access and Users]] | ||
* [[Data Import Example for MySQL]] | * [[Data Import Example for MySQL]] | ||
* [[Adding MySQL Users]] | * [[Adding MySQL Users]] | ||
Latest revision as of 08:44, 1 July 2017
A list of SQL statements to serve as examples of syntax.
Primary Commands
- SELECT - extracts data from a database
- UPDATE - updates data in a database
- DELETE - deletes data from a database
- INSERT INTO - inserts new data into a database
- CREATE DATABASE - creates a new database
- ALTER DATABASE - modifies a database
- CREATE TABLE - creates a new table
- ALTER TABLE - modifies a table
- DROP TABLE - deletes a table
- CREATE INDEX - creates an index (search key)
- DROP INDEX - deletes an index
Examples
- SELECT * FROM customers;
- SELECT grade, age, reportcategory FROM students WHERE classroom = 3;
- SELECT username FROM usertable WHERE username like "%icol%";
- DESCRIBE TABLE customer;
- SELECT usertable.UserName, Posts.PostID FROM usertable LEFT JOIN Posts ON usertable.UserID = Posts.UserID ORDER BY usertable.UserName;
- SELECT DISTINCT Name FROM forumusers;