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How to select only date from a DATETIME field in MySQL?
I have a table in the MySQL database that is set up with DATETIME . I need to SELECT in this table only by DATE and excluding the time.
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How to perform OR condition in django queryset?
I want to write a Django query equivalent to this SQL query:
4 Answers
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Execute stored procedure with an Output parameter?
... stored procedure that I am trying to test. I am trying to test it through SQL Management Studio. In order to run this test I enter ...
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What is the difference between Non-Repeatable Read and Phantom Read?
...n using "read uncommitted", it is incomplete. Snapshot isolation level (in SQL Server) is a much better alternative to read uncommitted. A valid use case for read uncommitted isolation level in a production system is rare IMO.
– BateTech
Mar 3 '18 at 13:09
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MySQL selecting yesterday's date
...ould otherwise require a cumbersome and wordy case statement, is that in mysql boolean values are 1 for true and 0 for false, so summing a condition effectively counts how many times it's true. Using this pattern can neaten up your SQL code.
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Optimistic vs. Pessimistic locking
...hown changes - the extra locking overhead is worth it.
Oh, and Microsoft SQL server defaults to page locking - basically the row you're reading and a few either side. Row locking is more accurate but much slower. It's often worth setting your transactions to read-committed or no-lock to avoid dead...
Select multiple records based on list of Id's with linq
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I get Local sequence cannot be used in LINQ to SQL implementations of query operators except the Contains operator. error when using LINQ2SQL datacontext.
– Mayank Raichura
Jan 30 '16 at 0:20
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What is the main difference between PATCH and PUT request?
...pdate code remotely.
One other possible use case is somewhat related to NoSQL databases, it is possible to store documents. Let say we use a JSON structure to send back and forth data from the server to the client. If we wanted to delete a field, we could use a syntax similar to the one in mongodb ...
SQlite Getting nearest locations (with latitude and longitude)
I have data with latitude and longitude stored in my SQLite database, and I want to get the nearest locations to the parameters I put in (ex. My current location - lat/lng, etc.).
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Facebook database design?
...as 100 friends, that means the table would contain 100'000'000'000 rows. MySQL partitioning?
– veidelis
Jun 4 '14 at 7:30
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