SQL for beginner
浏览数：28 /
时间：2015年06月12日
create table,
insert into ... values()
简单select查询
select
合计与标量
count, avg, max, min, sum
ucase, lcase, substring, len, round
select * from ItemMasters-- Aggregate-- COUNT() -> returns the Total no of records from table , AVG() returns the Average Value from Colum,MAX() Returns MaX Value from Column-- ,MIN() returns Min Value from Column,SUM() sum of total from ColumnSelect Count(*) TotalRows,AVG(Price) AVGPrice,MAX(Price) MAXPrice,MIN(Price) MinPrice,Sum(price) PriceTotalFROM ItemMasters-- Scalar-- UCASE() -> Convert to Upper Case ,LCASE() -> Convert to Lower Case,-- SUBSTRING() ->Display selected char from column ->SUBSTRING(ColumnName,StartIndex,LenthofChartoDisplay)--,LEN() -> lenth of column date,-- ROUND() -> Which will round the valueSELECT UPPER(Item_NAME) Uppers,LOWER(Item_NAME) Lowers,SUBSTRING(Item_NAME,2,3) MidValue,LEN(Item_NAME) Lenths,SUBSTRING(Item_NAME,2,LEN(Item_NAME)) MidValuewithLenFunction,ROUND(Price,0) as RoundedFROM ItemMasters
日期函数
其它 select函数
top, order by, distinct,
Where子句
where in, where between,
Group by 子句
having
子查询
where
连接查询
join
Inner Join,Left Outer Join,Right Outer Join and Full outer Join
union合并查询
公用表表达式(with)
视图
pivot行转列
存储过程
函数function
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