-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathQuery_Processing.txt
239 lines (206 loc) · 9.13 KB
/
Query_Processing.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
--CRAETE DATABASE
mysql> CREATE DATABASE ORDER_DB;
Query OK, 1 row affected (0.00 sec)
mysql> USE ORDER_DB;
Database changed
--CREATE TABLES
mysql> CREATE TABLE SALESMAN(
-> SALESMAN_ID INTEGER PRIMARY KEY,
-> NAME VARCHAR(20),
-> CITY VARCHAR(20),
-> COMMISSION VARCHAR(20));
Query OK, 0 rows affected (0.40 sec)
mysql> DESC SALESMAN;
+-------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------+-------+
| SALESMAN_ID | int(11) | NO | PRI | NULL | |
| NAME | varchar(20) | YES | | NULL | |
| CITY | varchar(20) | YES | | NULL | |
| COMMISSION | varchar(20) | YES | | NULL | |
+-------------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)
mysql> CREATE TABLE CUSTOMER(
-> CUSTOMER_ID INTEGER PRIMARY KEY,
-> CUST_NAME VARCHAR(20),
-> CITY VARCHAR(20),
-> GRADE INTEGER,
-> SALESMAN_ID INTEGER,
-> FOREIGN KEY (SALESMAN_ID) REFERENCES SALESMAN(SALESMAN_ID) ON DELETE SET
NULL);CREATE TABLE CUSTOMER(
Query OK, 0 rows affected (0.53 sec)
mysql> DESC CUSTOMER;
+-------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------+-------+
| CUSTOMER_ID | int(11) | NO | PRI | NULL | |
| CUST_NAME | varchar(20) | YES | | NULL | |
| CITY | varchar(20) | YES | | NULL | |
| GRADE | int(11) | YES | | NULL | |
| SALESMAN_ID | int(11) | YES | MUL | NULL | |
+-------------+-------------+------+-----+---------+-------+
5 rows in set (0.01 sec)
mysql> CREATE TABLE ORDERS(
-> ORDER_NO INTEGER PRIMARY KEY,
-> PURCHASE_AMOUNT DECIMAL(10,2),
-> ORDER_DATE DATE,
-> CUSTOMER_ID INTEGER,
-> SALESMAN_ID INTEGER,
-> FOREIGN KEY (CUSTOMER_ID) REFERENCES CUSTOMER(CUSTOMER_ID)ON DELETE CASCA
DE,
-> FOREIGN KEY (SALESMAN_ID) REFERENCES SALESMAN(SALESMAN_ID) ON DELETE CASC
ADE);
Query OK, 0 rows affected (0.80 sec)
mysql> DESC ORDERS;
+-----------------+---------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------------+------+-----+---------+-------+
| ORDER_NO | int(11) | NO | PRI | NULL | |
| PURCHASE_AMOUNT | decimal(10,2) | YES | | NULL | |
| ORDER_DATE | date | YES | | NULL | |
| CUSTOMER_ID | int(11) | YES | MUL | NULL | |
| SALESMAN_ID | int(11) | YES | MUL | NULL | |
+-----------------+---------------+------+-----+---------+-------+
5 rows in set (0.01 sec)
--INSERT VALUES
mysql> INSERT INTO SALESMAN VALUES(2000,'ABHISHEK','BANGALORE','25%');
Query OK, 1 row affected (0.06 sec)
mysql> INSERT INTO SALESMAN VALUES(2001,'HARI','MYSORE','30%');
Query OK, 1 row affected (0.07 sec)
mysql> INSERT INTO SALESMAN VALUES(2002,'PRAJITHA','BANGLORE','20%');
Query OK, 1 row affected (0.34 sec)
mysql> INSERT INTO SALESMAN VALUES(2003,'NITHIN','HYDERABAD','15%');
Query OK, 1 row affected (0.06 sec)
mysql> INSERT INTO CUSTOMER VALUES(1,'ARUN','BANGALORE',100,2000);
Query OK, 1 row affected (0.05 sec)
mysql> INSERT INTO CUSTOMER VALUES(2,'BRAHMADUTTAN','BANGALORE',200,2001);
Query OK, 1 row affected (0.32 sec)
mysql> INSERT INTO CUSTOMER VALUES(3,'HELNA','CHENNAI',200,2001);
Query OK, 1 row affected (0.30 sec)
mysql> INSERT INTO CUSTOMER VALUES(4,'SINDOORI','MANGALORE',200,2003);
Query OK, 1 row affected (0.32 sec)
mysql> INSERT INTO ORDERS VALUES(201,5000,'2021-06-02',1,2000);
Query OK, 1 row affected (0.07 sec)
mysql> INSERT INTO ORDERS VALUES(202,550,'2021-04-09',1,2001);
Query OK, 1 row affected (0.31 sec)
mysql> INSERT INTO ORDERS VALUES(203,550,'2021-07-15',2,2002);
Query OK, 1 row affected (0.06 sec)
mysql> INSERT INTO ORDERS VALUES(204,500,'2021-07-15',3,2001);
Query OK, 1 row affected (0.05 sec)
--DISPLAY TABLES
mysql> SELECT * FROM SALESMAN;
+-------------+----------+-----------+------------+
| SALESMAN_ID | NAME | CITY | COMMISSION |
+-------------+----------+-----------+------------+
| 2000 | ABHISHEK | BANGALORE | 25% |
| 2001 | HARI | MYSORE | 30% |
| 2002 | PRAJITHA | BANGLORE | 20% |
| 2003 | NITHIN | HYDERABAD | 15% |
+-------------+----------+-----------+------------+
4 rows in set (0.00 sec)
mysql> SELECT * FROM CUSTOMER;
+-------------+--------------+-----------+-------+-------------+
| CUSTOMER_ID | CUST_NAME | CITY | GRADE | SALESMAN_ID |
+-------------+--------------+-----------+-------+-------------+
| 1 | ARUN | BANGALORE | 100 | 2000 |
| 2 | BRAHMADUTTAN | BANGALORE | 200 | 2001 |
| 3 | HELNA | CHENNAI | 200 | 2001 |
| 4 | SINDOORI | MANGALORE | 200 | 2003 |
+-------------+--------------+-----------+-------+-------------+
4 rows in set (0.00 sec)
mysql> SELECT * FROM ORDERS;
+----------+-----------------+------------+-------------+-------------+
| ORDER_NO | PURCHASE_AMOUNT | ORDER_DATE | CUSTOMER_ID | SALESMAN_ID |
+----------+-----------------+------------+-------------+-------------+
| 201 | 5000.00 | 2021-06-02 | 1 | 2000 |
| 202 | 550.00 | 2021-04-09 | 1 | 2001 |
| 203 | 550.00 | 2021-07-15 | 2 | 2002 |
| 204 | 500.00 | 2021-07-15 | 3 | 2001 |
+----------+-----------------+------------+-------------+-------------+
4 rows in set (0.00 sec)
--(1)
mysql> SELECT GRADE,COUNT(DISTINCT CUSTOMER_ID)
-> FROM CUSTOMER
-> GROUP BY GRADE
-> HAVING GRADE>(SELECT AVG(GRADE)
-> FROM CUSTOMER
-> WHERE CITY='BANGALORE');
+-------+-----------------------------+
| GRADE | COUNT(DISTINCT CUSTOMER_ID) |
+-------+-----------------------------+
| 200 | 3 |
+-------+-----------------------------+
1 row in set (0.00 sec)
--(2)
mysql> SELECT SALESMAN_ID, NAME
-> FROM SALESMAN S
-> WHERE (SELECT COUNT(*)
-> FROM CUSTOMER C
-> WHERE C.SALESMAN_ID=S.SALESMAN_ID) > 1;
+-------------+------+
| SALESMAN_ID | NAME |
+-------------+------+
| 2001 | HARI |
+-------------+------+
1 row in set (0.00 sec)
--(3)
mysql> SELECT S.SALESMAN_ID, S.NAME, C.CUST_NAME, S.COMMISSION
-> FROM SALESMAN S, CUSTOMER C
-> WHERE S.CITY=C.CITY
-> UNION
-> SELECT S.SALESMAN_ID,S.NAME,'NO MATCH',S.COMMISSION
-> FROM SALESMAN S
-> WHERE CITY NOT IN
-> (SELECT CITY
-> FROM CUSTOMER)
-> ORDER BY 1 ASC;
+-------------+----------+--------------+------------+
| SALESMAN_ID | NAME | CUST_NAME | COMMISSION |
+-------------+----------+--------------+------------+
| 2000 | ABHISHEK | BRAHMADUTTAN | 25% |
| 2000 | ABHISHEK | ARUN | 25% |
| 2001 | HARI | NO MATCH | 30% |
| 2002 | PRAJITHA | NO MATCH | 20% |
| 2003 | NITHIN | NO MATCH | 15% |
+-------------+----------+--------------+------------+
5 rows in set (0.03 sec)
--(4)
mysql> CREATE VIEW V_SALESMAN AS
-> SELECT O.ORDER_DATE, S.SALESMAN_ID, S.NAME
-> FROM SALESMAN S,ORDERS O
-> WHERE S.SALESMAN_ID = O.SALESMAN_ID
-> AND O.PURCHASE_AMOUNT= (SELECT MAX(PURCHASE_AMOUNT)
-> FROM ORDERS C
-> WHERE C.ORDER_DATE=O.ORDER_DATE);CREATE VIEW V_SALESMAN AS
Query OK, 0 rows affected (0.06 sec)
mysql> SELECT* FROM V_SALESMAN;
+------------+-------------+----------+
| ORDER_DATE | SALESMAN_ID | NAME |
+------------+-------------+----------+
| 2021-06-02 | 2000 | ABHISHEK |
| 2021-04-09 | 2001 | HARI |
| 2021-07-15 | 2002 | PRAJITHA |
+------------+-------------+----------+
3 rows in set (0.00 sec)
--(5)
mysql> DELETE FROM SALESMAN
-> WHERE SALESMAN_ID=2000;
Query OK, 1 row affected (0.05 sec)
mysql> SELECT *FROM SALESMAN;
+-------------+----------+-----------+------------+
| SALESMAN_ID | NAME | CITY | COMMISSION |
+-------------+----------+-----------+------------+
| 2001 | HARI | MYSORE | 30% |
| 2002 | PRAJITHA | BANGLORE | 20% |
| 2003 | NITHIN | HYDERABAD | 15% |
+-------------+----------+-----------+------------+
3 rows in set (0.00 sec)
mysql> SELECT *FROM ORDERS;
+----------+-----------------+------------+-------------+-------------+
| ORDER_NO | PURCHASE_AMOUNT | ORDER_DATE | CUSTOMER_ID | SALESMAN_ID |
+----------+-----------------+------------+-------------+-------------+
| 202 | 550.00 | 2021-04-09 | 1 | 2001 |
| 203 | 550.00 | 2021-07-15 | 2 | 2002 |
| 204 | 500.00 | 2021-07-15 | 3 | 2001 |
+----------+-----------------+------------+-------------+-------------+
3 rows in set (0.00 sec)