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dev:sql:statements:select:home [2010/07/03 22:37] tdo |
dev:sql:statements:select:home [2010/07/05 19:56] tdo |
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| Omnidex will automatically optimize the SELECT statement using Omnidex indexes. | Omnidex will automatically optimize the SELECT statement using Omnidex indexes. | ||
| - | |||
| ===== Syntax ===== | ===== Syntax ===== | ||
| The syntax for the Omnidex SELECT statement is the following: | The syntax for the Omnidex SELECT statement is the following: | ||
| Line 20: | Line 19: | ||
| select_list | select_list | ||
| FROM data_source | FROM data_source | ||
| - | [ WHERE criteria_list ] | + | [ WHERE criteria_specification ] |
| - | [ GROUP BY group_by_list ] | + | [ GROUP BY group_by_specification ] |
| - | [ HAVING having_list ] | + | [ HAVING having_specification ] |
| - | [ ORDER BY order_by_list ] | + | [ ORDER BY order_by_specifcation ] |
| [ < UNION [ALL] | INTERSECT | EXCEPT > select_statement ] | [ < UNION [ALL] | INTERSECT | EXCEPT > select_statement ] | ||
| [ ON [ CURSOR ] cursor_no ] | [ INSTANCE instance_no ] | [ ON [ CURSOR ] cursor_no ] | [ INSTANCE instance_no ] | ||
| [ WITH option_list ] | [ WITH option_list ] | ||
| </code> | </code> | ||
| + | |||
| ==== Select_list syntax: ==== | ==== Select_list syntax: ==== | ||
| <code> | <code> | ||
| Line 37: | Line 37: | ||
| [ $uniquekey | $odxid ] | [ $uniquekey | $odxid ] | ||
| </code> | </code> | ||
| - | + | ==== FROM datasource: ==== | |
| - | ==== FROM Clause Syntax: ==== | + | ^See:^[[dev:sql:statements:select:from | FROM datasource Discussion ]]^ |
| <code> | <code> | ||
| FROM table_spec [ table_alias ] [, [table_spec2 [ table_alias ] [ $omnidex ] ] | FROM table_spec [ table_alias ] [, [table_spec2 [ table_alias ] [ $omnidex ] ] | ||
| Line 46: | Line 46: | ||
| [ <AND | OR> NOT] table_spec.linkfield = table_spec.linkfield ] | [ <AND | OR> NOT] table_spec.linkfield = table_spec.linkfield ] | ||
| </code> | </code> | ||
| - | ==== WHERE Clause Syntax: ==== | + | |
| - | [[dev:sql:statements:select:where | WHERE Clause Discussion ]] | + | ==== WHERE criteria_specification Syntax: ==== |
| + | ^See:^[[dev:sql:statements:select:where | WHERE criteria_specification Discussion ]]^ | ||
| <code> | <code> | ||
| WHERE [ criteria_list ] | WHERE [ criteria_list ] | ||
| Line 53: | Line 54: | ||
| [ IN (subquery) ] | [ IN (subquery) ] | ||
| </code> | </code> | ||
| - | + | ==== GROUP BY/HAVING group_by_specification Syntax: ==== | |
| - | ==== GROUP BY/HAVING Clause Syntax: ==== | + | ^See: ^[[dev:sql:statements:select:group_by | GROUP BY group_by_specification Discussion]]^ |
| <code> | <code> | ||
| GROUP BY group_by_columns | GROUP BY group_by_columns | ||
| Line 60: | Line 61: | ||
| [ left_operand IN (subquery) ] ] | [ left_operand IN (subquery) ] ] | ||
| </code> | </code> | ||
| - | ==== ORDER BY Clause Syntax: ==== | + | ==== ORDER BY order_by_specification Syntax: ==== |
| - | [[dev:sql:statements:select:order_by | Order By Discussion ]] | + | ^See:^[[dev:sql:statements:select:order_by | ORDER By order_by_specfication Discussion ]]^ |
| <code> | <code> | ||
| ORDER BY [ column_spec | column_position ] [ ASC | DESC ] | ORDER BY [ column_spec | column_position ] [ ASC | DESC ] | ||
| Line 67: | Line 68: | ||
| </code> | </code> | ||
| - | ==== WITH Clause Syntax: ==== | + | ==== WITH option_list: ==== |
| <code> | <code> | ||
| - | WITH options | + | WITH option_list |
| </code> | </code> | ||
| Line 82: | Line 83: | ||
| | $uniquekey | | | | $uniquekey | | | ||
| | $odxid | | | | $odxid | | | ||
| - | |||
| - | ==== FROM Clause ==== | ||
| - | | ||
| - | The From Datasource can be one of the following: | ||
| - | | table_spec | A table using a syntax of [database.]table. | | ||
| - | | $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.| | ||