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dev:sql:statements:select:from [2010/07/03 22:19] tdo |
dev:sql:statements:select:from [2016/06/28 22:38] (current) |
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====== Omnidex SQL: SELECT FROM Clause ====== | ====== Omnidex SQL: SELECT FROM Clause ====== | ||
{{page>:sql_bar&nofooter&noeditbtn}} | {{page>:sql_bar&nofooter&noeditbtn}} | ||
- | ^See Also:^[[dev:sql:statements:select:home | SELECT statement ]]^[[dev:sql:statements:select:from | FROM clause]]^[[dev:sql:statements:select:where |WHERE clause ]]^[[dev:sql:statements:select:group_by| GROUP BY clause]]^ | + | ^See Also:^[[dev:sql:statements:select:home | SELECT statement ]]^[[dev:sql:statements:select:where | WHERE clause]]^[[dev:sql:statements:select:group_by| GROUP BY clause]]^ [[dev:sql:statements:select:order_by |ORDER clause ]]^ |
===== Description ===== | ===== Description ===== | ||
- | |||
===== Syntax ===== | ===== Syntax ===== | ||
+ | <code> | ||
+ | FROM table_spec [ table_alias ] [, [table_spec2 [ table_alias ] [ $omnidex ] ] | ||
+ | [[ < LEFT | RIGHT >][ OUTER | CROSS ] ] | ||
+ | [ JOIN table_spec2 ] | ||
+ | [ ON table_spec1.linkfield = table_spec2.linkfield ] | ||
+ | [ <AND | OR> NOT] table_spec.linkfield = table_spec.linkfield ] | ||
+ | </code> | ||
- | Statement | ||
- | |||
===== Discussion ===== | ===== Discussion ===== | ||
- | + | ||
- | == arg1 == | + | The From Datasource can be one of the following: |
- | + | | table_spec | A table using a syntax of [database.]table. | | |
- | == arg2 == | + | | $OMNIDEX | An internal table automatically created and used for testing consisting of one row and one column. | |
+ | | (subquery) | A nested subquery. | | ||
+ | | JOIN Clause | Joins one or more tables.| | ||
===== Examples ===== | ===== Examples ===== |