correlated-subquery

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How to update based on anoter row in the same table?

I want to create a query that updates an int based on the int of the row with an id that is 1 higher.[详细]

2023-04-10 05:31 分类：问答
How to reduce many similar correlated subqueries?

This is part of a larger statement, but I\'m wondering if CTE o开发者_JS百科r another method would help make this more efficient or cleaner. I could write it as a table-valued function and include it[详细]

2023-04-09 09:27 分类：问答
SqlAlchemy closure in subquery

I have searched many topics and didn\'t find the answer, or question was too complex. So okay. This is my first question.[详细]

2023-04-02 07:52 分类：问答
MySQL correlated subquery SUM() ORDER BY

Is there anyway to optimize the following query: SELECT t1.id, (SELECT SUM(col1) FROM table_name_two t2 WHERE t2.name LIKE CONCAT(\'%\',t1.name)) AS col1_count[详细]

2023-03-30 17:19 分类：问答
Oracle correlated UPDATE

I\'m having difficulty with Oracle 10g syntax for a correlated UPDATE.I am processing this code in a PL/SQL procedure.[详细]

2023-03-28 21:48 分类：问答
NHibernate QueryOver select entity and aggregates

What I want to do is display a simple grid of data which contains the entity data, and the aggregate data of its children. For example lets use a Order and line items. I want to display the order info[详细]

2023-03-14 21:20 分类：问答
SQL Query - Distinct results

I have the following two tables: People [*ID*, Name] Pet [*PetID*, OwnerID, Species, Name] (OwnerID is a foreign key of ID)[详细]

2023-03-09 13:21 分类：问答
sql query: For each record where is_queue_empty=1 and queue_name is empty get immediate next record by timestamp where …

How can we construct sql query with following constraint. For each record where is_queue_empty=1 and queue_name is empty get im开发者_StackOverflowmediate next record by timestamp where is_queue_empt[详细]

2023-02-17 21:47 分类：问答
MySql variable in "where" clause problem

I have a query with subquery in it. the subquery returns the value, that i need to return in php and that also is used in \"where\" clause.i trying to figure out how can i not exequte th subquery two[详细]

2023-02-17 11:36 分类：问答
oracle: tune correlated subqueries in select clause

On Oracle 10gR2, given the开发者_如何学Go following query, it takes forever to run.This is because of all the correlated subqueries in the select clause.There has got to be a better way.I\'m thinking[详细]

2023-02-15 21:02 分类：问答