indexing

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How to Determine Optimal MySQL Table Indexes, When Contents of WHERE Clause Vary?

I have the following 2 mysql_queries: Query 1 (this query is repeated twice more for imgClass, and imgGender):[详细]

2023-04-07 00:44 分类：问答
Why can't you use a object property as an index in a for loop? (MATLAB)

Below is an example that doesn\'t work in Matlab because obj.yo is used as the for loop\'s index. You can just convert this to the equival开发者_Python百科ent while loop and it works fine, so why won\[详细]

2023-04-07 00:27 分类：问答
Oracle 11g: Index not used in "select distinct"-query

My question concerns Oracle 11g and the use of indexes in SQL queries. In my database, there is a table that is structured as followed:[详细]

2023-04-06 23:47 分类：问答
How to make a PHP GET Request method like this "http://somesite.com/games/213123"?

Hi guys I\'m wondering how to make this kind of requests to the server I looked at many sites and they use this technique. For example gametrailers.com => http://www.gametrailers.com/video/level-six-d[详细]

2023-04-06 22:27 分类：问答
How to get a specific jQuery item from a list of items?

I have this: <ul> <li>firs开发者_如何学编程t</li> <li>second</li> <li>third</li>[详细]

2023-04-06 21:40 分类：问答
db: find table name by id

It\'s possible to find a table name by an id? I have multiple tables that extends another table, when I find the id in the \"super\" table, I\'d like to know in which subtable is that id.[详细]

2023-04-06 21:33 分类：问答
How to create a special binary tree

I wish to index some data where the key is a ulong. This ulong (64 bits) represents a combo of products,[详细]

2023-04-06 20:51 分类：问答
access sql check if an index exists before creating

I\'m creating an index on table in an 开发者_JAVA技巧access database, programmatically: CREATE INDEX ind ON tableA (columnb);[详细]

2023-04-06 20:07 分类：问答
Designing table index

In a table with an id, several key values and several other \"data\" columns: T1 : id , k1 , k2 , k3 , data1, data2, ...[详细]

2023-04-06 14:45 分类：问答
How to reference numpy array objects?

I have numpy array: >>> data dtype([(\'date\', \'|O4\'), (\'value\', \'<f8\')] where date ob开发者_运维问答ject is Python datetime.date object which consists of all days in one year:[20[详细]

2023-04-06 13:15 分类：问答