A correlated subquery is a query that depends on the outer query for its values. This query can be executed repeatedly, one time for each row that could be selected by the outer query. The first example shows queries that are semantically equivalent to illustrate the difference between using ...
Follows theSELECTkeyword in the/*+<Plan hint>*/format. It is used to optimize the plan of aSELECTstatement block. For details, seeHint-based Tuning. In each statement, only the first/*+plan_hint*/comment block takes effect as a hint. Multiple hints can be written. ALL Specifies that a...
Translate a CSS selector to an equivalent XPath expression.Simon Potter
A valid string that represents a member property. Remarks The<SELECT slicer axis clause>expression must contain members in dimensions and hierarchies other than those referenced in the specified<SELECT query axis clause>expressions. If an attribute in the cube is omitted from the specified<SELECT que...
where_condition is an expression that evaluates to true for each row to be selected. The statement selects all rows if there is no WHERE clause. In the WHERE expression, you can use any of the functions and operators that MySQL supports, except for aggregate (group) functions. See ...
(subquery_restriction_clause::=,table_collection_expression::=) sample_clause::= Description of the illustration sample_clause.gif subquery_restriction_clause::= Description of the illustration subquery_restriction_clause.gif table_collection_expression::= ...
A condition is an expression that has a Boolean result. Only rows for which the condition evaluates to TRUE are returned in the result. LIMIT clause The LIMIT clause follows this syntax: LIMIT number The LIMIT clause limits the number of records that you want the query to return based ...
SingleStore supports these Aggregate Functions for expression syntax in SELECT statements: All aggregate functions exclude NULLs from their computations. For example, SELECT COUNT(c) FROM t returns the number of rows in t where c is not NULL. SELECT AVG(c) FROM t returns the average of the no...
TheWHEREclause, if given, indicates the condition or conditions that rows must satisfy to be selected.where_conditionis an expression that evaluates to true for each row to be selected. The statement selects all rows if there is noWHEREclause. ...
Since you have already stated in one of the blog that the above SQL expression will not transport a single row from DB to application server so this is even faster than regular SELECT SINGLE statement??? or in case the row exist on DB level then 'X' value will be populated to 'result...