Suppose that I have two tables stuff and search_index. For various reasons I would prefer to generate a custom index table with schema along the lines of the following.
Here is the my previous experiences about optimizing sql join: in MySQL, to have fast join, usually I will avoid type \'All\'. Basically, join will be faster if they have index fields in the table. E
I have a table Person with columns personId, teamId, departmentId, among others. Most of the query use a combination of these columns on the where.
I am confused with these 3 terms: cover index, compound index and multi-fields index. Are they same things? or eac开发者_开发问答h of them has subtle difference?
EDIT 3:The workaround I\'m using right now is to strip anything but letters, digits, and whitespace from both my queries and my indexed fields.This produces the desired behavior, but it\'s very much a
I have a simple question about how to use multiple indicies for an array or rec.array. More specifically, I want to isolate the cell(s) in an array which meet multiple stipulations.For example:
I\'m experiencing a problem with array indexing. Suppose you have an array a and another array b you want to use to use as index for a in order to assign some values to the position pointed by b eleme
I want to be able to do fast prefix searches over system.namespaces in my database which will have a huge number of collections. Is it okay to index system.namespaces? The Mongo docs seem to vaguely s
Is a non-clustered index on an 开发者_运维技巧int column considered more performant than one on a decimal or datetime column?In some ways: yes.
I\'m new to MySQL and have a few questions that I haven\'t been able to find any information on. Here is what I\'m trying to do:
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