存储过程mysql if条件判断 存储过程if else语句用法

    数据库中有两张表，A表主键为自动增长的并且是B表的外键且允许为空。现在要通过编程向B表中插入数据,可是在程序中是不允许给Int类型赋空值的如果不赋值就默认为0。为了解决这个为题最后考虑用存储过程的If Else最方便，具体的存储过程如下

create PROCEDURE [dbo].[P_Form_Control_Info_Add]
    @TypeName varchar(20),
    @Description varchar(50),
    @CtlColSpan int,
    @Sort int,
    @SourceID int,
    @FieldID int,
    @TableID int
AS
if @SourceID = 0
begin
INSERT INTO T_Form_Control_Info (
    [TypeName],
    [Description],
    [CtlColSpan],
    [Sort],
    [FieldID],
    [TableID]
) VALUES (
    @TypeName,
    @Description,
    @CtlColSpan,
    @Sort,
    @FieldID,
    @TableID
)
end
else 
begin
INSERT INTO T_Form_Control_Info (
    [TypeName],
    [Description],
    [CtlColSpan],
    [Sort],
    [SourceID],
    [FieldID],
    [TableID]
) VALUES (
    @TypeName,
    @Description,
    @CtlColSpan,
    @Sort,
    @SourceID,
    @FieldID,
    @TableID
)
end
return SCOPE_IDENTITY()