SQL statements can database query value
But return null
And a great god help find out what is going on

CodePudding user response:

You didn't return to the fields of the entity class

CodePudding user response:

ResultType="int"

CodePudding user response:

refer to the second floor wuning01234 response:

resultType="int"

Not int

CodePudding user response:

reference 1/f, understand amidst a reply:

you don't return to the fields of the entity class so

you mean sumtbmj this field?

CodePudding user response:

heart wide nature reference 4 floor response:

Quote: refer to 1st floor understand amidst a reply:

you don't return to the fields of the entity class so

you mean sumtbmj this field?

right, if there is no return value need to write a single entity