- What does lt; gt; (angle brackets) mean in MS-SQL Server?
What does <> (angle brackets) mean in MS-SQL Server? Asked 11 years, 8 months ago Modified 3 years, 10 months ago Viewed 80k times
- Should I use != or lt; gt; for not equal in T-SQL? - Stack Overflow
Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e g in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL Server", they say "As an example of when to choose the standard form, T-SQL supports two “not equal to” operators: <> and != The former is standard and the latter is not
- What does the @ symbol do in SQL? - Stack Overflow
The @CustID means it's a parameter that you will supply a value for later in your code This is the best way of protecting against SQL injection Create your query using parameters, rather than concatenating strings and variables The database engine puts the parameter value into where the placeholder is, and there is zero chance for SQL injection
- What does the SQL # symbol mean and how is it used?
The other answers are correct if you're dealing with SQL Server, and it's clear that you are But since the question title just says SQL, I should mention that there are some forms of SQL such as MySQL where a pound sign is used as an alternative commenting symbol
- 如何自学SQL？ - 知乎
SQL直来直去，只要定义必要的输入输出，没有对过程的控制。 了解SQL的大致情况后，我们再来看看如何学？ SQL是所有数据库查询的语言，sql由于本身结构化的特点，非常容易入手。
- SqlException: DB2 SQL error: SQLCODE: -302, SQLSTATE: 22001, SQLERRMC . . .
What does sqlcode -302 means? Where do i get the sqlcode definitions? Please advice Thanks,
- sql - Equals (=) vs. LIKE - Stack Overflow
When using SQL, are there any benefits of using = in a WHERE clause instead of LIKE? Without any special operators, LIKE and = are the same, right?
- sql - NOT IN vs NOT EXISTS - Stack Overflow
Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind [Order Details] od WHERE p
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