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------ SQL Transaction ----
CREATE DATABASE CustomersDB;
USE CustomersDB;
1.create table CUSTOMERS
CREATE TABLE CUSTOMERS(
ID INT NOT NULL,
NAME VARCHAR(20) NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(25),
SALARY DECIMAL(18,2),
PRIMARY KEY(ID)
);
Query OK, 0 rows affected (0.022 sec)
INSERT INTO Customers
(ID,NAME,AGE,ADDRESS,SALARY)
VALUES
(1,'Ramesh',32,'Ahmedabad',2000.00),
(2,'Khilan',25,'Delhi',1500.00),
(3,'Kaushik',23,'Kota',2000.00),
(4,'Chaitali',25,'Mumbai',6500.00),
(5,'Hardik',27,'Bhopal',8500.00),
(6,'Komal',22,'Hyderabad',4500.00),
(7,'Mufy',24,'Indore',1000.00);
SET autocommit = 0;
DELETE Customers
FROM Customers
WHERE age = 25;
SELECT * FROM Customers;
+----+---------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+---------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+---------+-----+-----------+---------+
5 rows in set (0.004 sec)
exit;
mysql -u root -p
(password)
use CustomersDB;
SELECT * FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
---using commit
DELETE
from Customers
WHERE age =25;
Query OK, 2 rows affected (0.006 sec)
SELECT *
FROM Customers;
+----+---------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+---------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+---------+-----+-----------+---------+
5 rows in set (0.000 sec)
commit;
5 rows in set (0.000 sec)
exit;
mysql -u root -p
(password)
use CustomersDB;
SELECT *
FROM Customers;
+----+---------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+---------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+---------+-----+-----------+---------+
DROP TABLE Customers;
CREATE TABLE CUSTOMERS(
ID INT NOT NULL,
NAME VARCHAR(20) NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(25),
SALARY DECIMAL(18,2),
PRIMARY KEY(ID)
);
Query OK, 0 rows affected (0.022 sec)
INSERT INTO Customers
(ID,NAME,AGE,ADDRESS,SALARY)
VALUES
(1,'Ramesh',32,'Ahmedabad',2000.00),
(2,'Khilan',25,'Delhi',1500.00),
(3,'Kaushik',23,'Kota',2000.00),
(4,'Chaitali',25,'Mumbai',6500.00),
(5,'Hardik',27,'Bhopal',8500.00),
(6,'Komal',22,'Hyderabad',4500.00),
(7,'Mufy',24,'Indore',1000.00);
SELECT *
from Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
START TRANSACTION;
DELETE
FROM Customers
WHERE AGE = 25;
SELECT *
FROM Customers;
+----+---------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+---------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+---------+-----+-----------+---------+
5 rows in set (0.000 sec)
ROLLBACK;
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
7 rows in set (0.000 sec)
SAVEPOINT SP1;
Query OK, 0 rows affected (0.000 sec)
DELETE
FROM Customers
WHERE ID = 1;
Query OK, 1 row affected (0.003 sec)
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
6 rows in set (0.000 sec)
SAVEPOINT SP2;
DELETE
FROM Customers
WHERE ID =2;
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
5 rows in set (0.000 sec)
SAVEPOINT SP3;
DELETE
FROM Customers
WHERE ID = 3;
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
4 rows in set (0.000 sec)
ROLLBACK TO SAVEPOINT SP2;
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
6 rows in set (0.000 sec)
ROLLBACK TO SAVEPOINT SP1;
SELECT *
FROM Customers;
+----+----------+-----+-----------+---------+
| ID | NAME | AGE | ADDRESS | SALARY |
+----+----------+-----+-----------+---------+
| 1 | Ramesh | 32 | Ahmedabad | 2000.00 |
| 2 | Khilan | 25 | Delhi | 1500.00 |
| 3 | Kaushik | 23 | Kota | 2000.00 |
| 4 | Chaitali | 25 | Mumbai | 6500.00 |
| 5 | Hardik | 27 | Bhopal | 8500.00 |
| 6 | Komal | 22 | Hyderabad | 4500.00 |
| 7 | Mufy | 24 | Indore | 1000.00 |
+----+----------+-----+-----------+---------+
7 rows in set (0.000 sec)