Difference between revisions of "SQL Syntax"

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''Learn more:'': [http://dev.mysql.com/doc/refman/5.5/en/select.html MySQL Select Statement syntax]
''Learn more:'': [http://dev.mysql.com/doc/refman/5.5/en/select.html MySQL Select Statement syntax]
===column_expr===
===column_expr===
There are several ways to specify columns:
:{ ''column_name'' | [[SQL Functions|SQL Function]] } [ [AS] ''alias'']
 
:{ ''column_name'' | [[SQL Functions|SQL Function]] }
:: [ [AS] ''alias'']


where:
where:

Revision as of 20:07, 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
  • [ ... ] - Optional (one or none)
  • [ ... ]* - Zero or more
  • { ... | ... } - 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_clause]
[LIMIT limit_by_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 also 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