 CREATE TABLE DEPARTMENTS (
  ID INTEGER PRIMARY KEY,
  DEPARTMENT_NAME TEXT NOT NULL
);

-- insert
INSERT INTO DEPARTMENTS VALUES (1,'Sales TEAM');
INSERT INTO DEPARTMENTS VALUES (2,'Accounting');
INSERT INTO DEPARTMENTS VALUES (3,'MARKETING');
INSERT INTO DEPARTMENTS VALUES (4,'DATA SCIENCE');




CREATE TABLE EMPLOYEES (
  Id INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  GENDER TEXT NOT NULL,
  DEPARTMENT_ID INTEGER,
  SALARY INTEGER,
  FOREIGN KEY (DEPARTMENT_ID) references DEPARTMENTS(ID)
);

-- insert
INSERT INTO EMPLOYEES VALUES (1, 'AHMED','MALE', 4,9000);
INSERT INTO EMPLOYEES VALUES (2, 'SARAH','FEMALE', 3,6000);
INSERT INTO EMPLOYEES VALUES (3, 'BODY','MALE', 1,6000);
INSERT INTO EMPLOYEES VALUES (4, 'SAMY','MALE', 2,6000);
INSERT INTO EMPLOYEES VALUES (5, 'OMI','FEMALE', 3,6000);
INSERT INTO EMPLOYEES VALUES (6, 'KHALTY','FEMALE', 3,6000);
INSERT INTO EMPLOYEES VALUES (7, 'NULL','FEMALE', 3,NULL);
INSERT INTO EMPLOYEES VALUES (8, 'SARAH','FEMALE', 2,5000);
INSERT INTO EMPLOYEES VALUES (9, 'AHMED','MALE', 2,6000);


-- ALTER TABLE EMPLOYEES
-- ADD CONSTRAINT EMPLOYEES_DEPARTMENTID_FK FOREIGN KEY(DEPARTMENTID) references DEPARTMENTS(DEPARTMENT_ID)

SELECT *
FROM EMPLOYEES;

SELECT *
FROM DEPARTMENTS;

create proc spnew
as
begin
select * from EMPLOYEES
end

create proc namne
@GENDER nvarchar(20),
@DEPARTMENT_ID int
as
begin
select name,GENDER,DEPARTMENT_ID
from EMPLOYEES
where GENDER = @GENDER and DEPARTMENT_ID = @DEPARTMENT_ID
end


namne 'MALE' , 1
-- lazem ara3y el tarteb bta3 el arguments 
-- aw aktek kol arg we el qema bta3toh 
-- we bkdah msh mohm el tarteb


namne @DEPARTMENT_ID = 1 , @GENDER = 'MALE'


-- 3shan a3raf el text ely maktob beh el stored proc 
-- hasta5dm el (system stored proc) >> (sp_helptext "name of my sp")

sp_helptext "namne"


-- ezay a3adel 3aleh

-- ast5dm (ALTER)

ALTER proc "proc_name"


-- hazfoh 

drop proc "proc_name"


-- law 3ayez t3ml increption leeh 

create proc "proc_name"
with encryption 



-- law 3ayez el sp traga3 VALUES

-- maaslan 3ayz yrga3ly 3add el records ele FEMALE maaslan

-- use the keyword (out or output)


create proc "proc_name"
@GENDER varchar(20),
@EMPLOYEESCount int out
as
begin
select @EMPLOYEESCount = count(ID)
from EMPLOYEES
where GENDER = @GENDER
end

declare "variable name" int

execute "proc_name" "MALE" , "variable name" out

-- 3ayez b2a atba3 2emet el variable dah

print "variable name"



-- system stored proc

1- sp_helptext 
2- sp_help
3- sp_dependes



-- mmkn badl ma arga3 output bst5dam out keyword

-- mmkn ast5dm (return)


create proc "proc_name"
as
begin
return (select count(ID) from EMPLOYEES)
end


-- 3shan a3mloh execute

1- ba3araf variable >> 

declare "totalempeyess" int


2- execute "totalempeyess" = "proc_name"

3- print "totalempeyess"


-- emta asta5dm return we emta out keyword


if i want return VALUES 

1- int >> mmkn easta5dm el etnen

2- text >> mynfa3sh return


el return >> btrga3 single VALUE




advantages

created 3 years ago

MySQL online editor

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About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

Open-source relational database management systems.
Reliable, very fast and easy to use database server.
Works on client-server model.
Highly Secure and Scalable
High Performance
High productivity as it uses stored procedures, triggers, views to write a highly productive code.
Supports large databases efficiently.
Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE

CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

Example

CREATE TABLE EMPLOYEE (
  empId INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  dept TEXT NOT NULL
);

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

DROP TABLE table_name;

5. RENAME

RENAME TABLE table_name1 to new_table_name1;

6. COMMENT

Single-Line Comments:

 --Line1;

Multi-Line comments:

   /* Line1,
   Line2 */

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, ...
FROM table_name
[where condition];

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001';

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001';

Indexes

1. CREATE INDEX

  CREATE INDEX index_name on table_name(column_name);

To Create Unique index:

  CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View:
CREATE VIEW View_name AS 
Query;

2. How to call view

SELECT * FROM View_name;

3. Altering a View

ALTER View View_name AS 
Query;

4. Deleting a View

DROP VIEW View_name;

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW [trigger_order] trigger_body
/* where
trigger_time: { BEFORE | AFTER }
trigger_event: { INSERT | UPDATE | DELETE }
trigger_order: { FOLLOWS | PRECEDES } */

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype)
BEGIN
/*Stored procedure code*/
END;

2. How to call Stored procedure

CALL sp_name;

3. How to delete stored procedure

DROP PROCEDURE sp_name;

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;