syntaxsqlCopy -- Syntax for Parallel Data WarehouseDELETE[FROM[database_name. [ schema ] . | schema. ]table_name] [WHERE<search_condition>] [OPTION(<query_options>[ ,...n ] ) ] [; ] Arguments WITH <common_table_expression>
对于查询情况,其实MySQL提供给我们一个功能来引导优化器更好的优化,那便是MySQL的查询优化提示(Query Optimizer Hints)。比如,想让SQL强制走索引的话,可以使用 FORCE INDEX 或者USE INDEX;它们基本相同,不同点:在于就算索引的实际用处不大,FORCE INDEX也得要使用索引。
For more information, see Query Hints (Transact-SQL). Remarks DELETE can be used in the body of a user-defined function if the object modified is a table variable. The DELETE statement may fail if it violates a trigger or tries to remove a row referenced by data in another table with ...
A DELETE query is an action query (SQL statement) that deletes a set of records according to criteria (search conditions) you specify. It's a very powerful feature and a fundamental part of relational databases since you can remove multiple records at one time, and can specify which records...
If the cursor is ambiguous and the plan or package was bound with CURRENTDATA(NO), DB2 might return an error to the application if DELETE WHERE CURRENT OF is attempted for any of the following: A cursor that is using block fetching A cursor that is using query parallelism A cursor that ...
A function to be called each time a response is received from the server while performing the requested operation. May be called multiple times. onResponse?: RawResponseCallback Property Value RawResponseCallback Inherited FromcoreClient.OperationOptions.onResponse ...
If the target of the delete operation is a view, the following conditions apply to the view: The FROM clause of the outer fullselect of the view definition must include a reference, directly or indirectly, to an application-period temporal table (SQLSTATE 42724M). ...
You cannot delete from a view except throughINSTEADOFtriggers if the defining query of the view contains one of the following constructs: A set operator ADISTINCToperator An aggregate or analytic function AGROUPBY,ORDERBY,MODEL,CONNECTBY, orSTARTWITHclause ...
"evaluating_constant_where_conditions": [ ] } } ] "expanded_query":"/* select#1 */ select `t_table_1`.`id` AS `id`,`t_table_1`.`task_id` AS `task_id` from `t_table_1` where <in_optimizer>(`t_table_1`.`task_id`,<exists>(/* select#2 */ select `t_table_2`.`id`...
app.config multiple values for a key App.config not being referenced app.config or settings.settings App.Config with |DataDirectory|\database.mdf and full path Apparantly this is rocket science. How do you change system audio volume with C#? Append text in the first line of files Appending...