day5 practice

Create table and insert data

        
        Field name Data type Primary key Foreign key Non-null Unique auto-increment
        id INT Yes No Yes Yes No
        name VARCHAR(50) No No Yes No No
        glass VARCHAR(50) No No Yes No     

         sch 表内容
        id    name    glass
        1    xiaommg glass 1
        2     xiaojun glass

        1. Create a storage function that can count the number of records in the table. The function name is count_sch()
        create function `count_sch`() returns int(11)
        begin declare c int default 0; select count(1) into c from emp; return c; end
       2. Create a stored procedure avg_sai with 3 parameters, namely deptno, job, receiving the average salary,
        function query emp table dept is 30, job is the average salary of the salesperson.
        create procedure `avg_sai`(in deptno int(10),in partment carchar(20),out avg_total float(20))
        begin select avg(incoming) into avg_total from emp where dept=deptno and job=partment;
        end