The first statement within the stored procedure is a DELETE to remove the existing rows in the local destination table SALES.
存储过程中的第一个语句是 DELETE,它删除本地目标表 SALES 中现有的行。
2
This query tests that every stored procedure is prefixed with "usp_" followed by "Insert", "Update", "Delete", or "Select", followed by at least one entity name.