#宣告

delimiter //;

create procedure pro_emp()

begin

  select * from emp;

end;

//

#呼叫

call pro_emp();

delimiter //;

create procedure pro_emp_no(eno int)

begin

  select ename from emp where empno=eno;

end;

call pro_emp_no(7369);

引數三種模式:

  IN:輸入模式(預設)

  OUT:輸出模式

  INOUT:輸入輸出模式

elimiter //;

create procedure sel_emp(eno int,out en varchar(20))

begin

   select ename into en from emp where empno = eno;

end;

#呼叫

call sel_emp(7788,@name);

select @name;

#根據員工姓名查詢職位

delimiter //;

create procedure sel_emp2(inout en_job varchar(20))

begin

  select job into en_job from emp where ename = en_job;

end;

#呼叫

set @name_job='scott';

call sel_emp2(@name_job);

select @name_job;

分支:  if

  delimiter //;

create procedure score(score int,out level varchar(20))

begin

 if score>=80 then

   set level='A';

 elseif score>=60 then

   set level ='B';

 else

   set level = 'C';

 end if;   

end;

迴圈:

#while  1+2+...+10

 delimiter //;

 create procedure calc1()

 begin

          #宣告變數

          declare i int;

          declare sum int;

          #賦值

          set i=1;

          set sum=0;

          #迴圈

          while i<=10 do

            set sum=sum+i;

                    set i=i+1;

          end while;

          select sum;

 end;

call calc1();

#loop

delimiter //;

 create procedure calc2()

 begin

          #宣告變數

          declare i int;

          declare sum int;

          #賦值

          set i=1;

          set sum=0;

          #迴圈

          lip:loop

            set sum = sum + i;

                    set i = i+1;

                    if i>10 then

                      leave lip;

                    end if;    

          end loop;

          select sum;

 end;

call calc2();

#repeat

delimiter //;

 create procedure calc3()

 begin

          #宣告變數

          declare i int;

          declare sum int;

          #賦值

          set i=1;

          set sum=0;

          #迴圈

          repeat

            set sum = sum + i;

                    set i = i+1;

                    until i>10

          end repeat;

          select sum;

 end;

call calc3();

delimiter //;

create function sel_name(eno int)

returns varchar(20)  #返回值型別

DETERMINISTIC #確定的

begin

  declare v_name varchar(20);

  select ename into v_name from emp where empno = eno;

         return v_name;

end;

select sel_name(7788);