we want to calculate the average marks scored in each course. To keep things simple, we’re only saving the grades of the students who passed the test. To pass the test, students need to get at least a D. So, we want to avoid the divide-by-zero error for courses where there is ...
说明:SELECTCOALESCE(dividend/NULLIF(divisor,0),0)FROMsometable For every divisor that is zero, you will get a zero in the result set. 引用:http://stackoverflow.com/questions/861778/how-to-avoid-the-divide-by-zero-error-in-sql
Dividing a non-zero or non-null value by zero or null will return the value Infinity, which is displayed in query results as the value "1.#INF". In most cases, you should check for division by zero to avoid this situation. The following example shows you how: //Returns 1.#INF when...
Predicate functions shouldn't rely on arithmetic or aggregation expressions returning NULL if they error (such as overflow or divide-by-zero), because this behavior is affected by the SET ANSI_WARNINGS (Transact-SQL), SET NUMERIC_ROUNDABORT (Transact-SQL), and SET ARITHABORT (Transact-SQL) optio...
When an UPDATE statement encounters an arithmetic error (overflow, divide by zero, or a domain error) during expression evaluation, the update isn't performed. The rest of the batch isn't executed, and an error message is returned. If an update to a column or columns participating in a cl...
When an UPDATE statement encounters an arithmetic error (overflow, divide by zero, or a domain error) during expression evaluation, the update isn't performed. The rest of the batch isn't executed, and an error message is returned. If an update to a column or columns participating in a cl...
NAME='John Doe'; would let a malicious user know that John Doe's salary is exactly $100,000. Even though there is a security predicate in place to prevent a malicious user from directly querying other people's salary, the user can determine when the query returns a divide-by-zero ...
Predicate functions shouldn't rely on arithmetic or aggregation expressions returning NULL if they error (such as overflow or divide-by-zero), because this behavior is affected by the SET ANSI_WARNINGS (Transact-SQL), SET NUMERIC_ROUNDABORT (Transact-SQL), and SET ARITHABORT (Transact-SQL) optio...
When an UPDATE statement encounters an arithmetic error (overflow, divide by zero, or a domain error) during expression evaluation, the update isn't performed. The rest of the batch isn't executed, and an error message is returned. If an update to a column or columns participating in a cl...
Automatically UpperCase ALL MS SQL Server Keywords AutoNumber in T-SQL Select Statement AVG ->Operand data type varchar is invalid for avg operator avoid insertion of duplicate entries in a BULK INSERT statement Bad performance of EXCEPT operator Basic - select with fixed values - ...