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When/Why to use Cascading in SQL Server?
When setting up foreign keys in SQL Server, under what circumstances should you have it cascade on delete or update, and what is the reasoning behind it?
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Joins are for lazy people?
...ntly had a discussion with another developer who claimed to me that JOINs (SQL) are useless. This is technically true but he added that using joins is less efficient than making several requests and link tables in the code (C# or Java).
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Delete all records in a table of MYSQL in phpMyAdmin
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Go to the Sql tab run one of the below query:
delete from tableName;
Delete: will delete all rows from your table. Next insert will take next auto increment id.
or
truncate tableName;
Truncate: will also delete the rows from yo...
2015互联网结束补贴战 从相杀到相爱只需一个长假 - 资讯 - 清泛网 - 专注C/...
...赶集网、美团和大众点评、携程和去哪儿、滴滴和快的，包括此前的优酷和土豆，就会发现，它们的共同点就是“烧钱”。因此如果要想预测下一个合并会是哪两个公司的话，只需要去找哪个领域目前是最烧钱的。所有的这些最...
PHP/MySQL insert row then get 'id'
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$link = mysqli_connect('127.0.0.1', 'my_user', 'my_pass', 'my_db');
mysqli_query($link, "INSERT INTO mytable (1, 2, 3, 'blah')");
$id = mysqli_insert_id($link);
See mysqli_insert_id().
Whatever you do, don't insert and then do a "SE...
Find the number of columns in a table
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In MySQL land (tagged in the question)... A MySQL database is equivalent to a schema in ANSI SQL and the table_catalog is always def
– Steve Buzonas
Mar 5 '14 at 18:17
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Grepping a huge file (80GB) any way to speed it up?
... command becomes:
LC_ALL=C fgrep -A 5 -B 5 'db_pd.Clients' eightygigsfile.sql
It will also be faster if you copy your file to RAM disk.
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Why is it not advisable to have the database and web server on the same machine?
...w with the Stack Overflow team ( part 1 and 2 ), he was adamant that the SQL server and application server should be on separate machines. Is this just to make sure that if one server is compromised, both systems aren't accessible? Do the security concerns outweigh the complexity of two servers ...
How to use GROUP_CONCAT in a CONCAT in MySQL
If I have a table with the following data in MySQL:
7 Answers
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Grant execute permission for a user on all stored procedures in database?
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CREATE ROLE <abc>
GRANT EXECUTE TO <abc>
EDIT
This works in SQL Server 2005, I'm not sure about backward compatibility of this feature, I'm sure anything later than 2005 should be fine.
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