How to use the SQL statement to get the results of the two fields multiplication? (note that the two-CodePudding

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How to use the SQL statement to get the results of the two fields multiplication? (note that the two

Time：11-17

CodePudding user response:

How to use this two tables?

CodePudding user response:

Not in the same table, just to get a view

CodePudding user response:

Same database directly using indicate. The column name is ok,