1 SQL Structured Query Language قسم التعريفات Data Definition Language (DDL) قسم التعامل مع البيانات Data Manipulation Language (DML) قسم الاستعلامات Data Control Language (DCL)

2 SELECT statement DML (Data Manipulation Language) SELECT * FROM TABLE_NAME * = All Oracle SQL Plus MS SQL Query Analyzer MYSQL

3 SELECT statement use northwind Select * from employees  F5 Select Productname, unitprice, supplierID from Products  F5

4 SELECT statement العمليات الحسابية Select productname, unitprice*5 from products  F5 Select 2500*4500  F5

5 SELECT statement Select ReportsTo from employees  F5 Null value Select isnull(ReportsTo, 0) from employees  F5 Null to 0

6 SELECT statement Select ProductName, Unitprice, (UnitPrice*16)Tax from products  F5 Select ProductName, Unitprice, (UnitPrice*16) as Tax from products  F5

7 SELECT statement Select FirstName+’ ‘+LastName as name from employees  F5 Select ProductName, Unitprice, (UnitPrice*16) as Tax from products  F5

8 SELECT statement where order by select * from Employees order by EmployeeID DESC  F5 select LastName, EmployeeID from Employees order by 2 DESC  F5

9 SELECT statement Where filed name = value Select * from Employees where EmployeeID = 8  F5

10 SELECT statement Comparison:- X = Y X > Y, X < Y X =Y X <> Y, X != Y, X^=Y

11 SELECT statement WHERE…..LIKE Select * from Employees where FirstName like ‘M%’  F5 like ‘M%l’ --- Not like ‘%s’ like ‘M_ _ _ _ _ _’  Micheal

12 SELECT statement WHERE …. Between [Value1] AND [Value2] Select * from products where unitprice between 40 and 80  F5

13 SELECT statement WHERE ….. IN ([Value1],[Value2], …) Select * from products where unitprice between 40 and 80  F5

14 SELECT statement Logic Operators (NOT, OR, AND) Select productName, unitPrice from products where unitPrice >= 25 and productName like ’N%’  F5 Select productName, unitPrice from products where unitPrice >= 25 or productName like ’N%’  F5

15 SELECT statement Single Row Functions String Functions :- (lower(x), Upper(x), Len(x), Substring(x,y,[z]), Round(x,y) substring(‘Abcdef’,1,2)  Ab Mathematical Functions:- Abs(n), Mod % – (5%2)  1, Sign(n)  1 if n is positive, -1 if n is negative number, Sqrt(n)

16 SELECT statement Single Row Functions Date Function :- dateAdd(datepart, number, date) – dateadd(month, 26,’15-MAR-99’)  15/5/01 Date part (month, day, year, week, hour, minute, second)

17 SELECT statement Single Row Functions (Not MS SQL) All kinds of Data :- (characters, Numbers, date) Greatest(x1,x2,x3,….) – Greatest(50, 90, 30)  90 Least(x1,x2,x3,…) – Least(50, 30, 100, 3)  3

18 SELECT statement Conversion Function Convert() Convert (Newtype, [Value]) Select unitprice, convert(varchar(8), unitprice) as CharUnit from products