Difference between revisions of "SQL Syntax"
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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_clause]]] | :::[WHERE [[#where_clause|where_clause]]] |
Revision as of 22:30, 14 November 2011
Here is the syntax for the SQL SELECT statement that the SQL parser recognizes.
- Considerations
-
- SQL syntax is case insensitive.
- Field and table names are case sensitive
- Legend
-
- [ x ] - Optional (one or none)
- [, x ... ] - Optional additional values, in a comma-separated list
- x | y - Choose one. Curly braces are added when needed: { x | y } ...
- CAPITALIZED - SQL Keyword (case insensitive)
- italicized - Value you supply. (Table names and column names are case-sensitive)
SELECT Statement
In a select statement, you designate one more columns, separated by commas (or "*" for all columns), plus 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 [ [AS] alias ] | 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;
- SELECT CONCAT(last_name,', ',first_name) AS full_name
Learn more:: SQL Functions