subquery

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tsql distinct count subquery2

I am using SSMS 2008 and I need to use a subquery to return the count of unique records / client. How do I do this? Currently I am getting the error:[详细]

2023-04-10 18:06 分类：问答
Any way to merge two queries in solr?

In my project, we use solr to index a lot of different kind of documents, by example Books and Persons, with some common fields (like the name) and some type-specific fields (like the category, or the[详细]

2023-04-10 17:25 分类：问答
tsql distinct count subquery

I am using SSMS 2008 and I need to use a subquery to return the count of unique records / client.How do I do this?Currently I am returning all unique records over the whole dataset and not per client.[详细]

2023-04-10 16:12 分类：问答
"subquery returns more than 1 row" error.

I am new to web programming and I\'m trying to make a twitter-clone.At this point, I have 3 tables: users (id, name)[详细]

2023-04-10 14:37 分类：问答
MYSQL: How to use outer aliases in subquery properly?

The first query works just fine. It returns one row from the table \'routepoint\'. It has a certain \'route_id\' and \'geo_distance()\' is on its minimum given the parameters. I know that the 开发者_如[详细]

2023-04-10 11:34 分类：问答
MySQL optimize subqueries

I want to optimize this query (since subqueries aren\'t fast in general), but I\'m lost because I cannot rewrite this using joins which will be better for performance, can you help mi with this?[详细]

2023-04-10 05:52 分类：问答
Can I use subqueries in a 'containable' condition?

In my CakePHP I have ModelA which hasMany ModelB. ModelB has an int value Q. Can I query ModelA and use containable to ensure that only those ModelB records with the maximum value for Q?[详细]

2023-04-09 23:56 分类：问答
Remove duplicates (1 to many) or write a subquery that solves my problem

Referring to the diagram below the records table has unique Records. Each record is updated, via comments through an Update Table. When I join the two I get lots of duplicates.[详细]

2023-04-09 18:33 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
MySQL Subqueries / Joins

I have two different tables, products and inventory. Basically, what I\'m trying to accomplish is I need to loop thru every row in my products table and reference the corresponding rows in the invent[详细]

2023-04-09 02:52 分类：问答