安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- 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
- SQL: IF clause within WHERE clause - Stack Overflow
Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE OrderNumber LIKE '%' + @
- SQL WITH clause example - Stack Overflow
353 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 called sub-query refactoring), which can be referenced in several places within the main SQL query The name assigned to the sub-query is treated as though it was an inline view or
- sql - Incorrect syntax near - Stack Overflow
SELECT TOP 1000 * FROM master sys procedures as procs left join master sys parameters as params on procs object_id = params object_id This seems totally correct, but I keep getting the following error: Msg 102, Level 15, State 1, Line 6 Incorrect syntax near '' It works if I take out the join and only do a simple select:
- sql server - SQL MAX of multiple columns? - Stack Overflow
How do you return 1 value per row of the max of several columns: TableName [Number, Date1, Date2, Date3, Cost] I need to return something like this: [Number, Most_Recent_Date, Cost] Query?
- How to calculate percentage with a SQL statement
Due to precedence of SQL statements it will be the same however, due to data types if using 100 you can still get the result rounded to 0 decimals you desire for the % where as if you put it after the division operation you would have to make sure that you cast to a data type that can handle the decimal places otherwise you will end up with
- sql server - Database stuck in Restoring state - Stack Overflow
Ran into a similar issue while restoring the database using SQL server management studio and it got stuck into restoring mode After several hours of issue tracking, the following query worked for me
- SQL to find the number of distinct values in a column
SQL to find the number of distinct values in a column Asked 17 years, 2 months ago Modified 2 years, 7 months ago Viewed 825k times
|
|
|