Difference between revisions of "SQL Syntax"
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imported>Aeric |
imported>Aeric |
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''Learn more:'' [[SQL Functions]] | ''Learn more:'' [[SQL Functions]] | ||
__TOC__ | __TOC__ | ||
;Legend: | |||
:* [ ... ] - Optional | |||
:* { ... | ... } - Choose one | |||
==SELECT STATEMENT== | ==SELECT STATEMENT== | ||
In a ''select'' statement, you designate one more columns, separated by commas, and a table to get the data from, plus additional options: | In a ''select'' statement, you designate one more columns, separated by commas, and a table to get the data from, plus additional options: | ||
:SELECT | :SELECT | ||
::[[#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] | ||
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There are several ways to specify columns: | There are several ways to specify columns: | ||
: | :{ ''column_name'' | ||
:| [DISTINCT] ''column_name'' | :| [DISTINCT] ''column_name'' | ||
:| [DISTINCT](''column_name'') | :| [DISTINCT](''column_name'') | ||
: ... | : ... | ||
:} | |||
where: | where: | ||
:;DISTINCT:Eliminates duplicate rows from the result set. | :;DISTINCT:Eliminates duplicate rows from the result set. |
Revision as of 19:24, 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
- { ... | ... } - Choose one
SELECT STATEMENT
In a select statement, you designate one more columns, separated by commas, and a table to get the data from, plus additional options:
- SELECT
- { * | column_expr (, column_expr)* }
- FROM table_reference
- [WHERE where_clause]
- [GROUP BY group_clause]
- [ORDER BY order_clause]
- [LIMIT limit_clause]
column_expr
There are several ways to specify columns:
- { column_name
- | [DISTINCT] column_name
- | [DISTINCT](column_name)
- ...
- }
where:
- DISTINCT
- Eliminates duplicate rows from the result set.