Difference between revisions of "SQL Syntax"

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__TOC__
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;Legend:
;Legend:
:* [ ... ] - Optional (one or none)
:* [ x ] - Optional (one or none)
:* [ ... ]* - Zero or more
:* [, x ... ] - Zero or more additional
:* { ... | ... } - Choose one
:* { x | y } - Choose one


==SELECT STATEMENT==
==SELECT STATEMENT==
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:SELECT
:SELECT
::[ DISTINCT ]
::[ DISTINCT ]
::{ * | [[#column_expr|column_expr]] [, [[#column_expr|column_expr]]]* }
::{ * | [[#column_expr|column_expr]] [, [[#column_expr|column_expr]]] ... }
::FROM [[#table_reference|table_reference]]
::FROM [[#table_reference|table_reference]]
:::[WHERE where_clause]
:::[WHERE where_clause]

Revision as of 20:10, 11 November 2011

Here is the syntax for the SQL SELECT statements that the SQL parser recognizes.

Considerations
  • SQL syntax is case insensitive.
  • Field and table names are case sensitive

Learn more:: SQL Functions

Legend
  • [ x ] - Optional (one or none)
  • [, x ... ] - Zero or more additional
  • { x | y } - Choose one

SELECT STATEMENT

In a select statement, you designate one more columns, separated by commas (or "*" for all columns), a table to get the data from, and additional options:

SELECT
[ DISTINCT ]
{ * | column_expr [, column_expr] ... }
FROM table_reference
[WHERE where_clause]
[GROUP BY group_by_clause]
[ORDER BY order_by_clause]
[LIMIT limit_clause]

where:

DISTINCT
Eliminates duplicate rows from the result set.
Note:
For example: DISTINCT(customer_name,address)

Learn more:: MySQL Select Statement syntax

column_expr

{ column_name | SQL Function } [ [AS] alias]

where:

alias
Displayed as the column name in the result set, in the SQL Browser.
Can be used as a field name in a group_by_clause or order_by_clause.
For example:
SELECT CONCAT(last_name,', ',first_name) AS full_name
FROM Customer_Contacts ORDER BY full_name;

group_by_clause

order_by_clause

limit_clause