What is triggering circuit?

1067

What should I give to Windows API functions that want a hWnd?

908

What is meant by PaaS, SaaS, and IaaS?

611

What is the standard of cotton yarn count?

1

SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.

2675

how many sql dml commands are supported by 'mysql'? : Sql dba

1123

What steps you take to ensure that the work you delegate is successful?

1184

What is alzheimer’s disease?

936

What is the bundle in android?

843

How to integrate appache with weblogic?

958

How is it possible to remove escape characters from a string?

1125

What is general insurance policy? What does it cover? : insurance sales

576

Why it is recommended to avoid referencing a floating point column in the where clause?

967

Which is better android lollipop or nougat?

885

What is use command in mysql?

1044