What does <> (angle brackets) mean in MS-SQL Server?
8 Nov 2013 · <> operator means not equal to in MS SQL. It compares two expressions (a comparison operator). When you compare nonnull expressions, the result is TRUE if the left …
sql - Not equal <> != operator on NULL - Stack Overflow
9 Oct 2014 · <> is Standard SQL-92; != is its equivalent. Both evaluate for values, which NULL is not -- NULL is a placeholder to say there is the absence of a value. Which is why you can only …
Should I use != or <> for not equal in T-SQL? - Stack Overflow
6 Apr 2009 · Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e.g. in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL …
sql是什么，通俗的说，太专业听不懂？ - 知乎
sql是一门语言，就和我们平时说话一样，有主谓宾的层次结构，同样sql也有自己的一套语法规则。 记住这些语法规则就可以与数据库打交道了，不管是查询，新增，更新，删除数据，都可 …
SQL WITH clause example - Stack Overflow
23 Sep 2012 · The SQL WITH clause was introduced by Oracle in the Oracle 9i release 2 database. The SQL WITH clause allows you to give a sub-query block a name (a process also …
How do I perform an IF...THEN in an SQL SELECT?
15 Sep 2008 · The CASE expression cannot be used to control the flow of execution of Transact-SQL statements, statement blocks, user-defined functions, and stored procedures. If your …
Convert Rows to columns using 'Pivot' in SQL Server
10 Apr 2013 · Pivot is one of the SQL operator which is used to turn the unique data from one column into multiple column in the output. This is also mean by transforming the rows into …
Convert Date format into DD/MMM/YYYY format in SQL Server
25 Jun 2013 · But this method somewhat ambiguous and it would be difficult for you to remember the number with respect to Specific Date Format. That's why in next versions of SQL server …
sql - Get list of all tables in Oracle? - Stack Overflow
15 Oct 2008 · SQL> alias details tables tables - tables <schema> - show tables from schema ----- select table_name "TABLES" from user_tables You don't have to define this alias as it comes …
SQL query to select dates between two dates - Stack Overflow
25 Feb 2011 · To ensure future-proofing your query for SQL Server 2008 and higher, Date should be escaped because it's a reserved word in later versions. Bear in mind that the dates without …