SQL exercises

January 21, 07:15 MSK

SQL Exercises is intended for acquiring good practical experience, which is focused on data operation, namely on SQL DML. Certain exercises for beginners are provided on the site, they are supplied with the necessary reference source on SQL syntax with a great number of examples. Apart from them, 3 rating stages are suggested, they are aimed at testing of specialists and their certification. The source is absolutely free of charge, and the certificate purchase has a voluntary basis.
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Results of exercises voting

In this Section you can see the results of voting for the tasks of the second and the third stages (SELECT exercises) on 10-score scale.
In order to estimate the tasks (if you have solved these yet), click here.

No	Exercise #	Rank	Number of votes
1	210	10.0	11
2	194	10.0	11
3	228	10.0	10
4	207	10.0	8
5	233	10.0	7
6	214	10.0	7
7	232	10.0	4
8	220	10.0	3
9	231	10.0	3
10	155	9.9	18
11	165	9.9	18
12	154	9.9	17
13	167	9.9	15
14	219	9.9	8
15	216	9.9	8
16	223	9.9	7
17	172	9.8	16
18	188	9.8	12
19	211	9.8	9
20	255	9.8	9
21	222	9.8	8
22	225	9.8	6
23	230	9.8	4
24	146	9.7	33
25	152	9.7	27
26	164	9.7	22
27	147	9.7	19
28	181	9.7	10
29	119	9.6	56
30	180	9.6	24
31	160	9.6	17
32	157	9.6	15
33	213	9.6	15
34	163	9.6	14
35	218	9.6	7
36	229	9.6	5
37	102	9.5	83
38	166	9.5	31
39	168	9.5	24
40	176	9.5	21
41	153	9.5	20
42	259	9.5	13
43	191	9.5	11
44	234	9.5	2
45	100	9.4	122
46	116	9.4	116
47	101	9.4	113
48	203	9.4	23
49	198	9.4	16
50	196	9.4	15
51	257	9.4	13
52	224	9.4	7
53	236	9.4	5
54	87	9.3	176
55	93	9.3	68
56	95	9.3	38
57	148	9.3	35
58	162	9.3	34
59	174	9.3	32
60	173	9.3	28
61	171	9.3	15
62	304	9.3	15
63	215	9.3	13
64	200	9.3	13
65	235	9.3	3
66	72	9.2	269
67	137	9.2	67
68	115	9.2	32
69	192	9.2	25
70	186	9.2	24
71	149	9.2	21
72	161	9.2	17
73	179	9.2	12
74	217	9.2	5
75	226	9.2	5
76	91	9.1	88
77	138	9.1	65
78	156	9.1	29
79	112	9.1	18
80	202	9.1	16
81	183	9.1	15
82	178	9.1	15
83	195	9.1	15
84	206	9.1	12
85	123	9.0	114
86	69	9.0	54
87	120	9.0	50
88	142	9.0	48
89	141	9.0	36
90	170	9.0	27
91	151	9.0	20
92	305	9.0	14
93	80	8.9	136
94	110	8.9	113
95	88	8.9	111
96	130	8.9	59
97	140	8.9	41
98	135	8.9	34
99	158	8.9	23
100	301	8.9	20
101	256	8.9	20
102	253	8.9	20
103	221	8.9	10
104	212	8.9	10
105	205	8.9	10
106	76	8.8	177
107	35	8.8	162
108	96	8.8	162
109	106	8.8	120
110	143	8.8	30
111	254	8.8	27
112	187	8.8	20
113	184	8.8	19
114	197	8.8	19
115	190	8.8	13
116	208	8.8	12
117	52	8.7	141
118	77	8.7	126
119	125	8.7	91
120	201	8.7	23
121	204	8.7	17
122	85	8.6	139
123	86	8.6	115
124	126	8.6	91
125	105	8.6	53
126	131	8.6	43
127	57	8.6	36
128	145	8.6	33
129	189	8.6	12
130	66	8.5	250
131	43	8.5	160
132	83	8.5	147
133	92	8.5	121
134	134	8.5	71
135	113	8.5	55
136	177	8.5	26
137	175	8.5	22
138	150	8.5	21
139	307	8.5	11
140	23	8.4	368
141	61	8.4	314
142	71	8.4	186
143	84	8.4	150
144	114	8.4	93
145	128	8.4	73
146	104	8.4	58
147	169	8.4	21
148	199	8.4	14
149	74	8.3	202
150	67	8.3	202
151	59	8.3	196
152	50	8.3	182
153	81	8.3	166
154	111	8.3	98
155	94	8.3	92
156	124	8.3	86
157	139	8.3	44
158	252	8.3	23
159	193	8.3	15
160	54	8.2	458
161	58	8.2	210
162	82	8.2	142
163	98	8.2	129
164	107	8.2	98
165	118	8.2	89
166	99	8.2	76
167	133	8.2	47
168	159	8.2	14
169	41	8.1	349
170	17	8.1	314
171	47	8.1	284
172	51	8.1	141
173	68	8.1	110
174	182	8.1	17
175	9	8.0	403
176	20	8.0	334
177	36	8.0	306
178	21	8.0	269
179	37	8.0	253
180	62	8.0	217
181	10	8.0	194
182	64	8.0	184
183	45	8.0	114
184	109	8.0	96
185	251	8.0	29
186	7	8.0	27
187	209	8.0	15
188	30	7.9	382
189	49	7.9	364
190	34	7.9	349
191	6	7.9	334
192	56	7.9	272
193	31	7.9	250
194	44	7.9	226
195	70	7.9	218
196	89	7.9	155
197	185	7.9	25
198	60	7.8	327
199	65	7.8	249
200	121	7.8	97
201	90	7.8	81
202	127	7.8	26
203	18	7.7	351
204	26	7.7	351
205	42	7.7	312
206	79	7.7	155
207	97	7.7	78
208	132	7.7	55
209	260	7.7	35
210	53	7.6	374
211	8	7.6	364
212	33	7.6	340
213	63	7.6	238
214	28	7.6	227
215	38	7.6	203
216	55	7.6	106
217	117	7.6	84
218	302	7.6	11
219	258	7.6	10
220	11	7.5	427
221	14	7.5	423
222	19	7.5	405
223	13	7.5	397
224	29	7.5	333
225	15	7.5	315
226	32	7.5	307
227	39	7.5	274
228	75	7.5	142
229	78	7.5	127
230	129	7.5	59
231	306	7.5	2
232	48	7.4	300
233	16	7.4	246
234	73	7.4	148
235	108	7.4	93
236	103	7.4	54
237	136	7.4	49
238	22	7.3	366
239	27	7.3	289
240	12	7.2	89
241	144	7.2	28
242	40	7.1	76
243	25	7.0	315
244	261	7.0	19
245	227	7.0	5
246	24	6.9	449
247	46	6.8	313
248	262	6.5	6
249	303	6.3	7
250	122	6.1	54

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