Untitled
unknown
plain_text
12 days ago
12 kB
2
Indexable
Never
gec@gec-H410M-H-V2:~$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.33-0ubuntu0.16.04.1 (Ubuntu)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database akshat;
Query OK, 1 row affected (0.00 sec)
mysql> use database akshat;
ERROR 1049 (42000): Unknown database 'database'
mysql> use akshat;
Database changed
mysql> use database;
ERROR 1049 (42000): Unknown database 'database'
mysql> create database akshat;
ERROR 1007 (HY000): Can't create database 'akshat'; database exists
mysql> use database;
ERROR 1049 (42000): Unknown database 'database'
mysql> use akshat;
Database changed
mysql> create table student;
ERROR 1113 (42000): A table must have at least 1 column
mysql> create table student(Name VARCHAR(20), Branch char(10),Regd.No. int);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'int)' at line 1
mysql> create table student(Name VARCHAR(20), Branch CHAR(10),Regd.No. INT);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INT)' at line 1
mysql> create table student(Name VARCHAR(20), Branch CHAR(10), Regd.No. INT);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INT)' at line 1
mysql> create table student(Name VARCHAR(20), Branch CHAR(10), Regd_No INT);
Query OK, 0 rows affected (0.27 sec)
mysql> insert into student values("rahul", "cse", 101)
-> insert into student values("rahul", "cse", 101);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'insert into student values("rahul", "cse", 101)' at line 2
mysql> insert into student values("rahul", "cse", 101);
Query OK, 1 row affected (0.05 sec)
mysql> insert into student values("raj", "civil", 102);
Query OK, 1 row affected (0.03 sec)
mysql> insert into student values("deepak", "aiml", 103);
Query OK, 1 row affected (0.03 sec)
mysql> insert into student values("ansul", "ds", 104);
Query OK, 1 row affected (0.02 sec)
mysql> insert into student values("ansul", "mech", 105);
Query OK, 1 row affected (0.04 sec)
mysql> insert into student values("hemant", "mca", 106);
Query OK, 1 row affected (0.05 sec)
mysql> insert into student values("arun", "mba", 106);
Query OK, 1 row affected (0.03 sec)
mysql> insert into student values("rishav", "bca", 106);
Query OK, 1 row affected (0.04 sec)
mysql> insert into student values("akshat", "cse", 107);
Query OK, 1 row affected (0.03 sec)
mysql> select * from student;
+--------+--------+---------+
| Name | Branch | Regd_No |
+--------+--------+---------+
| rahul | cse | 101 |
| raj | civil | 102 |
| deepak | aiml | 103 |
| ansul | ds | 104 |
| ansul | mech | 105 |
| hemant | mca | 106 |
| arun | mba | 106 |
| rishav | bca | 106 |
| akshat | cse | 107 |
+--------+--------+---------+
9 rows in set (0.00 sec)
mysql> select Name, Branch from student;
+--------+--------+
| Name | Branch |
+--------+--------+
| rahul | cse |
| raj | civil |
| deepak | aiml |
| ansul | ds |
| ansul | mech |
| hemant | mca |
| arun | mba |
| rishav | bca |
| akshat | cse |
+--------+--------+
9 rows in set (0.00 sec)
mysql> select Name from student;
+--------+
| Name |
+--------+
| rahul |
| raj |
| deepak |
| ansul |
| ansul |
| hemant |
| arun |
| rishav |
| akshat |
+--------+
9 rows in set (0.00 sec)
mysql> select * from student where name = "akshat";
+--------+--------+---------+
| Name | Branch | Regd_No |
+--------+--------+---------+
| akshat | cse | 107 |
+--------+--------+---------+
1 row in set (0.02 sec)
mysql> insert into student values("akshay", "ds", 107);
Query OK, 1 row affected (0.03 sec)
mysql> select * from student where Regd_No = 107;
+--------+--------+---------+
| Name | Branch | Regd_No |
+--------+--------+---------+
| akshat | cse | 107 |
| akshay | ds | 107 |
+--------+--------+---------+
2 rows in set (0.00 sec)
mysql> alter table student add(Math_mark int);
Query OK, 0 rows affected (0.58 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> select * from student;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| rahul | cse | 101 | NULL |
| raj | civil | 102 | NULL |
| deepak | aiml | 103 | NULL |
| ansul | ds | 104 | NULL |
| ansul | mech | 105 | NULL |
| hemant | mca | 106 | NULL |
| arun | mba | 106 | NULL |
| rishav | bca | 106 | NULL |
| akshat | cse | 107 | NULL |
| akshay | ds | 107 | NULL |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> update student set Math_mark = 97 where Name = "akshat";
Query OK, 1 row affected (0.06 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from student;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| rahul | cse | 101 | NULL |
| raj | civil | 102 | NULL |
| deepak | aiml | 103 | NULL |
| ansul | ds | 104 | NULL |
| ansul | mech | 105 | NULL |
| hemant | mca | 106 | NULL |
| arun | mba | 106 | NULL |
| rishav | bca | 106 | NULL |
| akshat | cse | 107 | 97 |
| akshay | ds | 107 | NULL |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> update student set Math_mark = 87 where Name = "rahul";
Query OK, 1 row affected (0.05 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> update student set Math_mark = 85 where Name = "raj";
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from student;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| rahul | cse | 101 | 87 |
| raj | civil | 102 | 85 |
| deepak | aiml | 103 | NULL |
| ansul | ds | 104 | NULL |
| ansul | mech | 105 | NULL |
| hemant | mca | 106 | NULL |
| arun | mba | 106 | NULL |
| rishav | bca | 106 | NULL |
| akshat | cse | 107 | 97 |
| akshay | ds | 107 | NULL |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> update student set Math_mark = 84 where Name = "deepak";
Query OK, 1 row affected (0.04 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> update student set Math_mark = 95 where Name = "ansul";
Query OK, 2 rows affected (0.03 sec)
Rows matched: 2 Changed: 2 Warnings: 0
mysql> update student set Math_mark = 83 where Name = "hemant";
Query OK, 1 row affected (0.04 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> update student set Math_mark = 89 where Name = "arun";
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> update student set Math_mark = 78 where Name = "rishav";
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from student;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| rahul | cse | 101 | 87 |
| raj | civil | 102 | 85 |
| deepak | aiml | 103 | 84 |
| ansul | ds | 104 | 95 |
| ansul | mech | 105 | 95 |
| hemant | mca | 106 | 83 |
| arun | mba | 106 | 89 |
| rishav | bca | 106 | 78 |
| akshat | cse | 107 | 97 |
| akshay | ds | 107 | NULL |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> select * from student order by Math_mark;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| akshay | ds | 107 | NULL |
| rishav | bca | 106 | 78 |
| hemant | mca | 106 | 83 |
| deepak | aiml | 103 | 84 |
| raj | civil | 102 | 85 |
| rahul | cse | 101 | 87 |
| arun | mba | 106 | 89 |
| ansul | ds | 104 | 95 |
| ansul | mech | 105 | 95 |
| akshat | cse | 107 | 97 |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> select * from student order by Regd_No by desc;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'by desc' at line 1
mysql> select * from student order by Regd_No by dsc;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'by dsc' at line 1
mysql> select * from student order by Regd_No desc;
+--------+--------+---------+-----------+
| Name | Branch | Regd_No | Math_mark |
+--------+--------+---------+-----------+
| akshat | cse | 107 | 97 |
| akshay | ds | 107 | NULL |
| hemant | mca | 106 | 83 |
| arun | mba | 106 | 89 |
| rishav | bca | 106 | 78 |
| ansul | mech | 105 | 95 |
| ansul | ds | 104 | 95 |
| deepak | aiml | 103 | 84 |
| raj | civil | 102 | 85 |
| rahul | cse | 101 | 87 |
+--------+--------+---------+-----------+
10 rows in set (0.00 sec)
mysql> select count(Regd_No) from student;
+----------------+
| count(Regd_No) |
+----------------+
| 10 |
+----------------+
1 row in set (0.00 sec)
mysql> select count(distinct (branch)) from student;
+--------------------------+
| count(distinct (branch)) |
+--------------------------+
| 8 |
+--------------------------+
1 row in set (0.00 sec)
mysql> select sum(Math_mark) from student;
+----------------+
| sum(Math_mark) |
+----------------+
| 793 |
+----------------+
1 row in set (0.00 sec)
mysql> select max(Math_mark) from student;
+----------------+
| max(Math_mark) |
+----------------+
| 97 |
+----------------+
1 row in set (0.00 sec)
mysql> select min(Math_mark) from student;
+----------------+
| min(Math_mark) |
+----------------+
| 78 |
+----------------+
1 row in set (0.00 sec)
mysql> select avg(Math_mark) from student;
+----------------+
| avg(Math_mark) |
+----------------+
| 88.1111 |
+----------------+
1 row in set (0.00 sec)
mysql> ^C
mysql> ALTER TABLE student RENAME COLUMN math_mark to mathmark;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'COLUMN math_mark to mathmark' at line 1
mysql> ALTER student RENAME COLUMN math_mark to mathmark;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'student RENAME COLUMN math_mark to mathmark' at line 1
mysql> ^C
mysql>
Leave a Comment