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How to switch databases in psql?
In MySQL , I used use database_name;
12 Answers
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Create SQLite Database and table [closed]
...pplication code, I would like to create and then interact with one or more SQLite databases.
1 Answer
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Handling List-types with Esqueleto
...asking for.
For your case I would insistently advise you to use a classic SQL queries. You can run n+1 queries, but do that only if it is rare and not often usable function, that for example prepares cached data (based on your variables names I suppose that it may not be heavy used and it worth a t...
Oracle中translate与replace的使用 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
... 三个参数中有一个是空，返回值也将是空值。
举例：SQL> select translate('abcdefga','abc','wo') 返回值 from dual;
返回值
-------
wodefgw
分析：该语句要将'abcdefga'中的'abc'转换为'wo',
由于'abc'中'a'...
App Inventor 2 如何连接MySQL数据库（阿里云数据库） · App Inventor 2 中文网
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App Inventor 2 如何连接MySQL数据库（阿里云数据库）
App Inventor 2 如何连接MySQL数据库
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Is there an SQLite equivalent to MySQL's DESCRIBE [table]?
I'm just getting started learning SQLite . It would be nice to be able to see the details for a table, like MySQL's DESCRIBE [table] . PRAGMA table_info [table] isn't good enough, as it only has basic information (for example, it doesn't show if a column is a field of some sort or not). Does SQL...
How do I find a default constraint using INFORMATION_SCHEMA?
...talog views (sys.*) instead of system table views, which are deprecated in SQL Server 2005 and later.
Below is pretty much the same as @user186476's answer. It returns the name of the default value constraint for a given column. (For non-SQL Server users, you need the name of the default in order t...
How to set a default value for an existing column
This isn't working in SQL Server 2008:
13 Answers
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Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...database queries, always try and use prepared parameterised queries. The mysqli and PDO libraries support this. This is infinitely safer than using escaping functions such as mysql_real_escape_string.
Yes, mysql_real_escape_string is effectively just a string escaping function. It is not a magic bu...
SQL multiple column ordering
I am trying to sort by multiple columns in SQL, and in different directions. column1 would be sorted descending, and column2 ascending.
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