i am trying to create a query where there is a count of related records from another table. I\'d like the \"paren开发者_Python百科t\" records whether there are related records (a count) or not.
SELECT a,b,count(*) FROM t GROUP BY rollup(a,b) result: a1, b1, 10 a1, b2, 90 a1,, 100 i need: a1, b1, 10, 100
I would like to ask something about query using mysql I have this table called video_stat, and here\'s the field
Okay, so I have a (SQLite) table called log wherein one column (time) is a Unix epoch timestamp (the other columns are irrelevant for my purposes). These are timestamped log entries.
This question already has answers here: SELECT COUNT(*) AS count - How to use this count (5 answers) Closed 1 year ago.
I am using will_paginate with some complicated queries and it is unable to correctly calculate number of total records (in order to display proper number of page links) - namely because of grouping by
I have a table of users, and in this table I have a country field telling where these people are from (i.e. \"Sweden\", \"I开发者_高级运维taly\", ...). How can I do a SQL query to get something like:
I have a NumPy matrix that contains mostly non-zero values, but occasionally will contain a zero value. I need to be able to:
Here is how I am currently counting mysql rows in PHP: //GET total # of results and build $start and $end for main SQL statement
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