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Count(*) vs Count(1) - SQL Server
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In SQL Server, these statements yield the same plans.
Contrary to the popular opinion, in Oracle they do too.
SYS_GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000...
Find all tables containing column with specified name - MS SQL Server
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@Revious INFORMATION_SCHEMA views included in SQL Server comply with the ISO standard definition for the INFORMATION_SCHEMA., sys.columns, sys.tables is Microsoft Sql Server specific.
– Tomasito
Mar 18 '14 at 21:36
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SQL Server IIF vs CASE
I recently came to know about the availability of IIF function in SQL Server 2012. I always use nested CASE in my queries. I want to know the exact purpose of the IIF statement and when should we prefer using IIF over CASE Statement in the query.
I mostly use nested CASE in my queries.
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What's the purpose of SQL keyword “AS”?
You can set table aliases in SQL typing the identifier right after the table name.
9 Answers
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Check if table exists in SQL Server
...ke this to be the ultimate discussion on how to check if a table exists in SQL Server 2000/2005 using SQL Statements.
28 An...
Escaping keyword-like column names in Postgres
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Some warning: Without the quotes PostgreSQL folds all identifiers to lowercase. MyTable, myTable and mytable are just the same. With the quotes this folding is not done. So "MyTable" is no more the same as mytable.
– A.H.
Oct ...
Why is SQL Server 2008 Management Studio Intellisense not working?
...es, or other methods, then I hope I may be of assistance.
I have Applied SQL 2008 R2 Service Pack 1 which you can download here
http://www.microsoft.com/download/en/details.aspx?id=26727
32 Bit:
SQLServer2008R2SP1-KB2528583-x86-ENU.exe
64 Bit:
SQLServer2008R2SP1-KB2528583-x64-ENU.exe
I have ap...
使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
使用std::string作为std::map的key出错解决c: program files (x86) microsoft visual studio 11.0 vc include xstddef(180): error C2784: bool std::operator <(const st...c:\program files (x86)\microsoft visual studio 11.0\vc\include\xstddef(180): error C2784: “bool std::operator <(const std:...
为AppInventor2开发自己的拓展(Extension) - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...的逻辑。上手很容易，但是由于代码块提供的功能有限，使用比较单一，在开发上有很大的局限性，但是它提供了拓展Extension特性，开放了源码，使得开发者可以根据自己的需要，自定义开发原生组件实现不了的、更加强大的功...
How should I use try-with-resources with JDBC?
...separate method:
public List<User> getUser(int userId) {
String sql = "SELECT id, username FROM users WHERE id = ?";
List<User> users = new ArrayList<>();
try (Connection con = DriverManager.getConnection(myConnectionURL);
PreparedStatement ps = con.prepareSta...