SQL exercises

October 18, 06:29 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	306	10.0	1
11	155	9.9	18
12	165	9.9	18
13	154	9.9	17
14	167	9.9	15
15	219	9.9	8
16	216	9.9	8
17	223	9.9	7
18	172	9.8	16
19	188	9.8	12
20	211	9.8	9
21	255	9.8	9
22	222	9.8	8
23	225	9.8	6
24	230	9.8	4
25	146	9.7	33
26	152	9.7	27
27	164	9.7	22
28	147	9.7	19
29	181	9.7	10
30	119	9.6	55
31	180	9.6	24
32	160	9.6	17
33	157	9.6	15
34	213	9.6	15
35	163	9.6	14
36	218	9.6	7
37	229	9.6	5
38	102	9.5	83
39	166	9.5	31
40	168	9.5	24
41	176	9.5	21
42	153	9.5	20
43	259	9.5	13
44	191	9.5	11
45	236	9.5	4
46	234	9.5	2
47	100	9.4	122
48	116	9.4	115
49	101	9.4	112
50	203	9.4	23
51	198	9.4	16
52	196	9.4	15
53	257	9.4	13
54	224	9.4	7
55	87	9.3	174
56	93	9.3	67
57	95	9.3	37
58	148	9.3	35
59	162	9.3	34
60	174	9.3	32
61	173	9.3	28
62	171	9.3	15
63	304	9.3	15
64	215	9.3	13
65	200	9.3	12
66	235	9.3	3
67	72	9.2	268
68	137	9.2	67
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	226	9.2	5
75	217	9.2	5
76	91	9.1	87
77	138	9.1	65
78	115	9.1	31
79	156	9.1	29
80	202	9.1	16
81	183	9.1	15
82	195	9.1	15
83	178	9.1	15
84	206	9.1	12
85	123	9.0	112
86	69	9.0	52
87	120	9.0	49
88	142	9.0	48
89	141	9.0	36
90	170	9.0	27
91	112	9.0	16
92	305	9.0	14
93	80	8.9	135
94	110	8.9	113
95	88	8.9	109
96	140	8.9	41
97	135	8.9	33
98	158	8.9	23
99	301	8.9	20
100	253	8.9	20
101	256	8.9	20
102	151	8.9	19
103	205	8.9	10
104	221	8.9	10
105	212	8.9	10
106	76	8.8	176
107	35	8.8	161
108	96	8.8	161
109	77	8.8	125
110	106	8.8	120
111	130	8.8	57
112	143	8.8	30
113	254	8.8	27
114	187	8.8	20
115	184	8.8	19
116	197	8.8	19
117	190	8.8	13
118	208	8.8	12
119	125	8.7	88
120	57	8.7	32
121	201	8.7	23
122	204	8.7	17
123	52	8.6	138
124	86	8.6	113
125	126	8.6	89
126	134	8.6	70
127	105	8.6	53
128	145	8.6	33
129	189	8.6	12
130	66	8.5	248
131	43	8.5	156
132	83	8.5	146
133	85	8.5	137
134	92	8.5	120
135	113	8.5	54
136	131	8.5	41
137	177	8.5	26
138	175	8.5	22
139	150	8.5	21
140	7	8.5	20
141	307	8.5	11
142	23	8.4	367
143	61	8.4	311
144	71	8.4	185
145	84	8.4	148
146	114	8.4	92
147	104	8.4	58
148	169	8.4	21
149	199	8.4	14
150	74	8.3	201
151	67	8.3	198
152	59	8.3	194
153	50	8.3	178
154	81	8.3	165
155	82	8.3	141
156	111	8.3	98
157	94	8.3	91
158	124	8.3	84
159	128	8.3	71
160	139	8.3	44
161	252	8.3	23
162	193	8.3	15
163	54	8.2	456
164	58	8.2	209
165	98	8.2	129
166	107	8.2	98
167	118	8.2	88
168	99	8.2	76
169	133	8.2	46
170	159	8.2	14
171	41	8.1	348
172	17	8.1	313
173	47	8.1	280
174	51	8.1	138
175	68	8.1	107
176	182	8.1	17
177	20	8.0	333
178	36	8.0	305
179	21	8.0	268
180	37	8.0	252
181	62	8.0	215
182	64	8.0	181
183	45	8.0	111
184	109	8.0	96
185	251	8.0	29
186	209	8.0	15
187	9	7.9	398
188	30	7.9	381
189	49	7.9	360
190	34	7.9	349
191	6	7.9	327
192	56	7.9	268
193	44	7.9	223
194	70	7.9	216
195	10	7.9	191
196	89	7.9	152
197	185	7.9	25
198	60	7.8	325
199	31	7.8	248
200	121	7.8	95
201	90	7.8	80
202	26	7.7	351
203	18	7.7	350
204	42	7.7	310
205	65	7.7	247
206	79	7.7	154
207	97	7.7	78
208	260	7.7	35
209	127	7.7	24
210	53	7.6	372
211	8	7.6	360
212	33	7.6	339
213	63	7.6	236
214	38	7.6	201
215	55	7.6	103
216	117	7.6	83
217	132	7.6	54
218	302	7.6	11
219	258	7.6	10
220	11	7.5	425
221	14	7.5	421
222	19	7.5	404
223	13	7.5	395
224	29	7.5	332
225	15	7.5	313
226	32	7.5	306
227	39	7.5	272
228	28	7.5	226
229	75	7.5	141
230	78	7.5	126
231	129	7.5	57
232	48	7.4	297
233	16	7.4	245
234	73	7.4	147
235	108	7.4	93
236	103	7.4	54
237	136	7.4	49
238	22	7.3	365
239	27	7.3	288
240	144	7.2	28
241	12	7.1	87
242	40	7.1	74
243	25	7.0	314
244	261	7.0	19
245	227	7.0	5
246	24	6.9	448
247	46	6.8	313
248	262	6.5	6
249	303	6.3	7
250	122	6.0	52

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