Database Connectivity

Author: RavinRakholiya

p23.py

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+import mysql.connector   
+
+
+
+# Type Status in MySQL command line client
+
+
+
+# # Create connection
+# conn=mysql.connector.connect(host='localhost', username='root', password='java')
+# print(conn)                                                                        # o/p: <mysql.connector.connection.MySQLConnection object at 0x00F4C880>
+
+
+# # my_cursor=conn.cursor()
+# # query="CREATE DATABASE p_database"
+# # my_cursor.execute(query)
+# # conn.commit()
+# # conn.close()
+
+
+
+
+# my_cursor=conn.cursor()                                 # o/p: ('employees',)
+# query="SHOW DATABASES"                                  #      ('information_schema',)
+# my_cursor.execute(query)                                #      ('mysql',)
+#                                                         #      ('new_database',)
+# for database_name in my_cursor:                         #      ('p_database',)
+#     print(database_name)                                #      ('performance_schema',)
+# conn.commit()                                           #      ('sakila',)
+# conn.close()                                            #      ('sales',) 
+#                                                         #      ('sys',)
+#                                                         #      ('world',)
+
+# # This gives me tuple
+
+
+
+
+
+# # To get output in list
+
+# my_cursor=conn.cursor()
+# query="SHOW DATABASES"
+# my_cursor.execute(query)
+# print(my_cursor.fetchall())                    # o/p: [('employees',), ('information_schema',), ('mysql',), ('new_database',), ('p_database',), ('performance_schema',), ('sakila',), ('sales',), ('sys',), ('world',)]
+# conn.commit()
+# conn.close()
+
+
+
+
+
+
+# # If i want to use created database
+# conn=mysql.connector.connect(host='localhost', username='root', password='java', database='p_database')
+# my_cursor=conn.cursor()
+# my_cursor.execute("CREATE TABLE student(name VARCHAR(255), age INT)")
+# conn.commit()
+# conn.close()
+
+
+
+# conn=mysql.connector.connect(host='localhost', username='root', password='java', database='p_database')
+# my_cursor=conn.cursor()
+# query="INSERT INTO student(name, age) VALUES(%s,%s)"                   # in MYSQL---> %s   and in SQLITE---->?
+# values=[
+#     ('Ravin',22),
+#     ('Rupen',29),
+#     ('Renish',28),
+#     ('Rockey',27),
+#     ('Rock',26),
+#     ('Rensom',25),
+#     ('Ram',24),
+#     ('Ronny',23)]
+
+# # my_cursor.execute(query, values)           # only for one value
+
+# my_cursor.executemany(query, values)         # for many values
+# conn.commit()
+# conn.close()
+
+
+
+
+
+
+
+
+
+
+
+# conn=mysql.connector.connect(host='localhost', username='root', password='java', database='p_database')
+# my_cursor=conn.cursor()
+# query="select * from student"                   
+# my_cursor.execute(query)           
+# for columns in my_cursor:
+#     print(columns)
+# conn.commit()
+# conn.close()
+
+
+# # o/p: ('Ravin', 22)
+# #      ('Ravin', 22)
+# #      ('Rupen', 29)
+# #      ('Renish', 28)
+# #      ('Rockey', 27)
+# #      ('Rock', 26)
+# #      ('Rensom', 25)
+# #      ('Ram', 24)
+# #      ('Ronny', 23)
+
+
+
+
+
+
+
+
+
+
+conn=mysql.connector.connect(host='localhost', username='root', password='java', database='p_database')
+my_cursor=conn.cursor()
+query="select * from student"                   
+my_cursor.execute(query)           
+print(my_cursor.fetchall())     # o/p: [('Ravin', 22), ('Ravin', 22), ('Rupen', 29), ('Renish', 28), ('Rockey', 27), ('Rock', 26), ('Rensom', 25), ('Ram', 24), ('Ronny', 23)]
+conn.commit()
+conn.close()