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For each row return the column name of the largest value
...partment name, rather than the number of roster counts, from the frequency table. A simple example below (column names = departments, row names = employee ids).
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How to do INSERT into a table records extracted from another table
I'm trying to write a query that extracts and transforms data from a table and then insert those data into another table. Yes, this is a data warehousing query and I'm doing it in MS Access. So basically I want some query like this:
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Does MySQL index foreign key columns automatically?
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Yes, but only on innodb. Innodb is currently the only shipped table format that has foreign keys implemented.
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REST URI convention - Singular or plural name of resource while creating it
...from our database schema. And database standards tend to advocate singular table names, so we're going with that, but still under the same logic as this answer.
– André C. Andersen
Nov 24 '17 at 12:01
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How do I create an HTML table with a fixed/frozen left column and a scrollable body?
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If you want a table where only the columns scroll horizontally, you can position: absolute the first column (and specify its width explicitly), and then wrap the entire table in an overflow-x: scroll block. Don't bother trying this in IE...
Is there any performance gain in indexing a boolean field?
...is is not entirely correct, without an index mySql needs to scan the whole table to find the relevant rows.
– ilanco
May 9 '12 at 22:04
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Unique BooleanField value in Django?
...d that some of them address the same issue successfully and each one is suitable in different situations:
I would choose:
@semente: Respects the constraint at the database, model and admin form levels while it overrides Django ORM the least possible. Moreover it can probably be used inside a thr...
How to check which locks are held on a table
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You can find current locks on your table by following query.
USE yourdatabase;
GO
SELECT * FROM sys.dm_tran_locks
WHERE resource_database_id = DB_ID()
AND resource_associated_entity_id = OBJECT_ID(N'dbo.yourtablename');
See sys.dm_tran_locks
If multip...
What are the best practices for using a GUID as a primary key, specifically regarding performance?
I have an application that uses GUID as the Primary Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly, I haven't seen any problem, but I'm about to start a new application and I still want to use the GUIDs as the Primary Keys, b...
LEFT JOIN vs. LEFT OUTER JOIN in SQL Server
... at the answer I left on this other SO question: SQL left join vs multiple tables on FROM line?.
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