大约有 9,000 项符合查询结果（耗时：0.0381秒） [XML]
Extracting hours from a DateTime (SQL Server 2005)
...omoting lazy shorthand that leads to confusion or worse. See #6 here blogs.sqlsentry.com/aaronbertrand/… and sqlblog.com/blogs/aaron_bertrand/archive/2011/09/20/…
– Aaron Bertrand
Oct 6 '14 at 19:44
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What is the equivalent of bigint in C#?
...t am I supposed to use when handling a value in C#, which is bigint for an SQL Server database?
10 Answers
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How do I set a column value to NULL in SQL Server Management Studio?
...rtcut is specific to SSMS (and its predecessor, Enterprise Manager). Azure SQL Server features are all built in an entirely new interface on the web.
– TylerH
2 days ago
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Run PostgreSQL queries from the command line
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psql -U username -d mydatabase -c 'SELECT * FROM mytable'
If you're new to postgresql and unfamiliar with using the command line tool psql then there is some confusing behaviour you should be aware of when you've entered an i...
SQL Group By with an Order By
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In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
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Difference between scaling horizontally and vertically for databases [closed]
I have come across many NoSQL databases and SQL databases. There are varying parameters to measure the strength and weaknesses of these databases and scalability is one of them. What is the difference between horizontally and vertically scaling these databases?
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Recommended SQL database design for tags or tagging [closed]
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+1 Nice to see some NoSQL implementations also.
– Xeoncross
Mar 18 '11 at 16:24
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PL/SQL, how to escape single quote in a string?
In the Oracle PL/SQL, how to escape single quote in a string ? I tried this way, it doesn't work.
4 Answers
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how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
Some SQL servers have a feature where INSERT is skipped if it would violate a primary/unique key constraint. For instance, MySQL has INSERT IGNORE .
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SQL WHERE condition is not equal to?
...le of times.. but it didn't seem to work until I realized that DELETE in MySQL does not use the * ..
– Frank Vilea
May 27 '11 at 19:59
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