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How to do a regular expression replace in MySQL?
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With MySQL 8.0+ you could use natively REGEXP_REPLACE function.
12.5.2 Regular Expressions:
REGEXP_REPLACE(expr, pat, repl[, pos[, occurrence[, match_type]]])
Replaces occurrences in the string expr that match the regular expressio...
How to get multiple counts with one SQL query?
... Thanks for this very elegant solution. Btw, this also works with TSQL.
– Annie Lagang
Sep 9 '16 at 0:52
7
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How do you deploy your ASP.NET applications to live servers?
...base
For keeping databases in sync I use http://www.red-gate.com/products/sql-development/sql-compare/
If server is behind bunch of routers and you can't directly connect (which is requirement of SQL Compare), use https://secure.logmein.com/products/hamachi2/ to create VPN.
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Multiple “order by” in LINQ
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The only downside to using the SQL syntax for Linq is that not all of the functions are supported, most but not all
– Joshua G
Jul 19 '15 at 19:09
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MySQL - force not to use cache for testing speed of query
I'm testing the speed of some queries in MySQL. The database is caching these queries making it difficult for me to get reliable results when testing how fast these queries are.
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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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0:web Connected Primary/Secondary UpToDate/UpToDate C r----
3.2挂载使用
mke2fs -j -L DRBD /dev/drbd0 # 仅在一个节点执行
mkdir /mnt/drbd
mount /dev/drbd0 /mnt/drbd
如果之前提升二个节点都为主资源时,在这个 /mnt/drbd
目录下同时读写可能会有IO异常,导...
The SQL OVER() clause - when and why is it useful?
...uck 2005 Green
5678ASDF Ford Mustang 2008 Yellow
Run below SQL
SELECT VIN,
MAKE,
MODEL,
YEAR,
COLOR ,
COUNT(*) OVER (PARTITION BY YEAR) AS COUNT2
FROM DIM_EQUIPMENT
The result would be as below
VIN MAKE MODEL YEAR COLOR COUNT2
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INSERT with SELECT
...HASULTANTEMURI Different question. But if I understand what you're asking, SQL Server (not what was asked, but what I use these days) has the OUTPUT clause, which lets you put whatever you inserted into another table also. I don't think MySQL has an equivalent. You might create a temporary table, se...
'^M' character at end of lines
When I run a particular SQL script in Unix environments, I'm am seeing a '^M' character at the end of each line of the SQL script as it is echoed to the command-line. I don't know on which OS the SQL script was originally created.
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SQL UPDATE all values in a field with appended string CONCAT not working
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That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(dat...