SQLServer 存储过程中不拼接SQL字符串实现多条件查询

以前拼接的写法

set @sql=\' select * from table where 1=1 \'

if (@addDate is not null) 

     set @sql = @sql+\' and  addDate = \'+ @addDate + \'  \' 
if (@name <>\'\' and is not null) 
    set @sql = @sql+ \' and name = \' + @name + \' \'
exec(@sql)

下面是 不采用拼接SQL字符串实现多条件查询的解决方案

第一种写法是 感觉代码有些冗余
if (@addDate is not null) and (@name <> \'\') 
      select * from table where addDate = @addDate and name = @name 
else if (@addDate is not null) and (@name =\'\') 
      select * from table where addDate = @addDate 
else if(@addDate is  null) and (@name <> \'\') 
      select * from table where and name = @name 
else if(@addDate is  null) and (@name = \'\') 
select * from table 

第二种写法是 

select * from table where (addDate = @addDate or @addDate is null) and (name = @name or @name = \'\') 
第三种写法是

SELECT * FROM table where 
addDate = CASE @addDate IS NULL THEN addDate ELSE @addDate END, 
name = CASE @name WHEN \'\' THEN name ELSE @name END