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Using group by on multiple columns
...one group.
To illustrate using an example, let's say we have the following table, to do with who is attending what subject at a university:
Table: Subject_Selection
+---------+----------+----------+
| Subject | Semester | Attendee |
+---------+----------+----------+
| ITB001 | 1 | John ...
SQL statement to get column type
Is there a SQL statement that can return the type of a column in a table?
22 Answers
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How to select records from last 24 hours using SQL?
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SELECT *
FROM table_name
WHERE table_name.the_date > DATE_SUB(CURDATE(), INTERVAL 1 DAY)
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How do you debug MySQL stored procedures?
...current process for debugging stored procedures is very simple. I create a table called "debug" where I insert variable values from the stored procedure as it runs. This allows me to see the value of any variable at a given point in the script, but is there a better way to debug MySQL stored procedu...
Azure table storage returns 400 Bad Request
...exception. How can I know what went wrong? I was trying to inset data in a table. Can't azure give me more details?
19 Answ...
What is the difference between bottom-up and top-down?
...ds the root.
Tabulation - You can also think of dynamic programming as a "table-filling" algorithm (though usually multidimensional, this 'table' may have non-Euclidean geometry in very rare cases*). This is like memoization but more active, and involves one additional step: You must pick, ahead of...
Internet Explorer 9 not rendering table cells properly
...t.com/IE/feedback/details/649949/innerhtml-formatting-issues-on-very-large-tables
YOu can remove the space inbetween td by using javascript if your html is returned from ajax, then from the response, you replace it with
response_html = response_html.replace(/td>\s+<td/g,'td><td');
$('...
How do I size a UITextView to its content?
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Tested on iOS 7 to resize an UITextView into an UITableViewCell. Works really great. This is the only answer that finally worked for me. Thanks!
– Alex
Nov 30 '13 at 18:40
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Change limit for “Mysql Row size too large”
... the following to the my.cnf file under [mysqld] section.
innodb_file_per_table=1
innodb_file_format = Barracuda
ALTER the table to use ROW_FORMAT=COMPRESSED.
ALTER TABLE nombre_tabla
ENGINE=InnoDB
ROW_FORMAT=COMPRESSED
KEY_BLOCK_SIZE=8;
There is a possibility that the above sti...
SQLite - How do you join tables from different databases?
...econd SQLite database, but I'm having a hard time figuring out how to join tables from the different databases.
3 Answers
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