SqlServer函数使用

SqlServer去除重复查询第一条数据：

　　select ID from(
　　　　select *, row_number() over (partition by SynCode order by id) as RowNum  from syn_table
　　) s  where s.RowNum = 1

 

SqlServer合并行用逗号隔开：

　　SELECT name,LEFT(ItemName,LEN(ItemName)-1) FROM (
　　SELECT name,
　　　　(SELECT name+',' FROM Base_BarcodeGroup c WHERE c.NAME=b.Name FOR XML PATH('')
　　)AS ItemName  FROM  Base_BarcodeGroup as b  GROUP BY   name
 　   )AS a

 

SqlServer字符串in查询

　　DECLARE @UnitCode VARCHAR(50)='1,2,3'
　　select * from dbo.Table1 where PATINDEX('%,'+RTRIM(TestNo)+',%',','+@UnitCode+',')>0

Oreacle 批量插入：

Insert into 表名(ID,Name,Sex) 
select SEQ_Table_ID.nextVal,Name,Sex from (
   select  '张三'  name,'男' Sex from dual  union 
   select  '李四'  name,'男' Sex from dual   
)