Rating of second-stage exercises (average) on SQL Exercises

SQL exercises

March 21, 16:50 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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Rating of second-stage exercises (average)

Rating of 2nd-stage exercises (median)

No - exercise number; Bonus - level of difficulty;
Solved - number of visitors, who have solved this exercise;
Time(min) - the average time (calculated over TOP 20) that has been spent for solution in minutes;
noOK - number of visitors, who have not solved this exercise yet.
(Click on a cell to see list of these);
Rank - average score on a result of voting.

No	Bonus	Solved	Time(min)	noOK	Author	Date	Rank
254	1	45	190498	1	Baser	2011-09-02	8.8
211	2	14	173915	1	Baser	2014-06-30	9.8
223	2	13	157657	0	Baser	2016-11-12	9.9
217	4	9	113664	4	pegoopik	2015-08-28	9.2
234	3	5	95156	1	Kursist	2020-02-28	9.7
151	3	35	90967	4	anddros	2008-12-30	9.0
159	3	17	88573	1	anddros	2012-07-22	8.2
251	4	68	74852	3	paparome	2006-10-01	8.0
214	4	11	73899	0	pegoopik	2015-05-30	10.0
175	3	30	71785	1	pegoopik	2011-04-28	8.5
190	4	17	70717	1	vlksm	2012-03-17	8.9
255	4	14	68481	4	vlksm	2012-02-14	9.8
252	2	35	67434	3	Ozzy	2009-06-14	8.4
101	4	218	66697	16	pegoopik	2010-11-20	9.4
178	3	23	64295	1	Baser	2011-08-13	9.1
102	4	184	64195	8	GriGrim	2011-07-16	9.5
304	2	24	63065	0	aks_nsk	2016-02-05	9.3
172	3	22	59687	0	Ozzy	2011-03-11	9.8
220	3	7	58774	1	pegoopik	2016-12-17	10.0
96	3	416	58462	81	anddros	2008-11-22	8.8
191	3	14	58423	0	qwrqwr	2012-06-08	9.5
143	5	46	57178	14	inkerman	2007-10-07	8.8
189	4	15	52225	0	Baser	2012-02-05	8.6
181	4	15	51625	1	Ozzy	2011-10-08	9.7
259	4	22	50526	2	anddros	2009-08-24	9.5
258	3	25	49820	0	Baser	2014-09-19	7.6
216	3	11	49497	1	pegoopik	2015-05-15	9.9
187	3	26	47200	0	=Maxim=	2011-12-31	8.8
169	3	31	45744	0	Valdaj	2010-09-02	8.5
138	5	146	44372	33	Cyrilus	2005-12-09	9.1
93	3	171	42786	5	qwrqwr	2014-03-14	9.3
173	1	52	40030	3	Ozzy	2011-01-13	9.3
253	3	30	39967	7	$erges	2008-05-17	8.9
165	2	30	38654	3	vlksm	2010-03-18	9.9
205	2	16	38349	0	qwrqwr	2013-11-22	8.9
194	4	15	37950	1	pegoopik	2012-07-13	10.0
261	1	35	37829	1	Fomichev	2013-12-07	7.0
120	4	106	37589	2	pegoopik	2014-02-14	9.0
99	3	198	35317	8	Dmitrij Grinkevich	2012-05-05	8.3
188	3	17	34385	1	qwrqwr	2012-02-04	9.8
148	2	67	32566	7	vlksm	2008-09-06	9.3
174	1	56	29937	0	qwrqwr	2011-02-25	9.3
157	3	24	28226	2	anddros	2009-06-05	9.6
212	3	16	27716	0	Baser	2014-10-14	8.9
92	2	561	27545	9	paparome	2006-07-26	8.5
233	1	16	26945	1	pegoopik	2019-03-08	10.0
49	2	1202	26758	22	anddros	2009-06-05	7.9
163	3	19	26664	0	Ozzy	2010-01-08	9.6
57	2	164	26004	16	Kursist	2020-10-10	8.3
224	3	11	24375	0	selber	2017-04-14	9.5
160	3	27	24342	0	Ozzy	2009-08-07	9.6
154	4	26	23397	3	anddros	2009-03-18	9.9
186	1	37	23340	0	Ozzy	2011-12-30	9.2
149	3	35	21580	2	$erges	2008-09-08	9.2
161	3	22	21439	3	Ozzy	2009-11-06	9.3
119	5	109	20891	4	Velmont	2014-03-07	9.6
153	3	37	20110	4	Ozzy	2009-02-14	9.5
116	5	247	19494	20	$erges	2008-12-13	9.4
126	2	186	18693	12	$erges	2008-09-07	8.6
150	4	37	18162	4	@Nikotin	2008-11-09	8.6
147	4	28	18075	2	$erges	2010-08-06	9.7
171	3	19	17760	1	Ozzy	2010-12-05	9.3
122	1	137	16023	2	Dmitrij Grinkevich	2012-09-14	5.9
237	3	2	15761	2	Baser	2022-05-13	10.0
184	2	25	15219	2	Baser	2011-11-26	8.8
176	3	31	14985	0	qwrqwr	2011-05-20	9.5
156	2	51	14817	3	anddros	2009-04-17	9.1
19	1	2016	13539	23	Serge I	2004-06-23	7.5
145	3	71	11864	1	pvv	2008-01-07	8.6
62	2	728	11588	10	Dmitrij Grinkevich	2012-02-11	8.0
193	2	22	11370	0	Baser	2012-07-06	8.3
164	2	37	11169	1	anddros	2010-04-26	9.7
106	3	284	10702	6	vlksm	2008-11-27	8.8
100	4	252	10440	10	qwrqwr	2010-04-27	9.4
215	2	23	10440	0	pegoopik	2015-03-06	9.3
206	4	14	9282	0	Baser	2013-11-23	9.1
183	2	30	9016	2	GriGrim	2011-11-12	9.1
210	2	15	9016	0	_dimon_	2014-02-07	10.0
257	4	17	8812	1	pegoopik	2012-02-20	9.4
230	2	8	8606	1	pegoopik	2018-07-27	9.8
208	3	14	8424	0	pegoopik	2013-12-20	8.8
218	4	13	8380	2	al29	2016-04-04	9.6
115	2	81	8174	1	selber	2016-05-28	9.1
139	2	126	7537	2	Snowbear	2006-09-09	8.3
155	3	27	7331	2	vlksm	2009-04-17	9.9
225	2	11	6846	0	pegoopik	2017-07-15	9.9
200	3	19	6776	0	qwrqwr	2013-10-05	9.3
144	4	46	6638	4	pvv	2008-01-01	7.3
141	4	80	6558	10	vlksm	2006-10-29	9.0
137	4	191	6428	25	Cyrilus	2005-03-06	9.2
222	2	14	6419	1	pegoopik	2016-12-23	9.8
152	3	47	6401	4	vlksm	2009-01-05	9.7
180	3	32	6342	0	qwrqwr	2011-09-16	9.6
77	2	312	6212	33	selber	2015-07-10	8.7
262	2	14	6157	0	selber	2019-06-21	7.0
198	2	23	5228	0	Angellore	2013-09-13	9.4
179	3	17	4926	0	pegoopik	2011-09-17	9.2
123	3	248	4724	38	Ozzy	2009-08-22	9.0
45	2	467	4707	15	dumkan	2016-04-03	8.0
229	3	7	4615	1	al29	2018-03-23	9.7
227	3	10	4590	1	mcrain	2017-12-08	7.3
140	2	82	4518	2	_Bkmz_	2010-01-30	8.9
168	2	43	4507	2	qwrqwr	2010-08-27	9.5
213	2	26	4445	0	qwrqwr	2014-10-17	9.6
121	3	408	4424	3	ZrenBy	2004-02-26	7.7
133	2	92	4324	0	pickman	2011-07-01	8.2
132	3	111	4322	4	risp	2010-01-25	7.7
231	3	6	4196	0	mcrain	2018-08-24	10.0
26	1	1503	3993	25	VIG	2003-12-22	7.7
182	3	23	3548	0	Baser	2011-10-29	8.1
158	3	38	3320	0	Ozzy	2010-04-09	8.9
135	3	65	3181	2	qwrqwr	2013-04-19	8.9
65	3	721	3058	51	Ozzy	2010-01-29	7.7
131	2	93	2994	1	GriGrim	2012-05-25	8.6
72	4	1025	2891	149	paparome	2005-12-03	9.2
107	2	407	2864	9	Fiolent	2004-02-26	8.1
167	3	24	2850	0	qwrqwr	2011-01-18	9.9
98	4	585	2770	44	ZrenBy	2003-09-01	8.2
221	2	17	2706	1	Baser	2016-11-05	8.9
87	4	640	2653	89	Roman Golubin	2006-07-14	9.3
207	3	17	2644	0	pegoopik	2016-01-15	10.0
232	3	6	2570	0	al29	2018-08-20	10.0
256	1	39	2460	1	anddros	2013-11-08	8.9
89	3	417	2414	31	_Bkmz_	2008-06-21	7.9
185	1	43	2363	3	=Maxim=	2011-11-25	7.9
302	0	37	2328	0	pegoopik	2012-07-27	7.6
136	3	114	2306	5	Ozzy	2011-05-12	7.5
146	3	62	2262	3	paparome	2008-01-22	9.7
209	1	33	2078	1	Baser	2013-12-30	8.0
199	3	20	1981	0	Baser	2013-08-17	8.4
228	1	19	1891	1	qwrqwr	2018-01-12	10.0
204	1	34	1878	1	anddros	2013-11-19	8.7
166	1	61	1865	1	anddros	2010-07-26	9.5
219	2	17	1856	0	pegoopik	2016-04-08	9.9
195	3	26	1775	0	Dmitrij Grinkevich	2013-04-20	9.1
71	3	546	1700	23	anddros	2009-12-26	8.4
76	3	459	1637	16	silver	2010-01-23	8.8
196	3	25	1616	0	qwrqwr	2013-05-17	9.4
125	3	374	1609	3	dimzv	2004-02-29	8.7
58	3	636	1540	12	qwrqwr	2013-03-01	8.2
235	2	7	1473	0	Kursist	2021-07-10	9.5
127	2	61	1441	2	GriGrim	2014-12-21	7.9
130	2	120	1434	0	anddros	2010-05-22	8.9
85	3	370	1434	19	Ozzy	2009-10-10	8.5
20	2	1515	1412	31	VIG	2003-09-01	8.0
142	2	115	1377	1	paparome	2007-03-24	9.0
84	3	420	1308	16	Ozzy	2009-12-26	8.4
134	3	176	1242	4	pvv	2008-01-22	8.5
111	2	456	1232	3	Fiolent	2005-01-19	8.3
105	2	142	1206	0	Baser	2013-09-20	8.6
197	1	43	1185	0	pegoopik	2013-06-10	8.8
64	3	613	1169	49	qwrqwr	2010-05-13	8.1
162	2	59	1167	0	Ozzy	2009-12-26	9.3
108	3	282	1166	5	crescent	2011-03-23	8.9
110	3	434	1166	11	Snowbear	2006-03-14	8.9
203	1	40	1137	1	=Maxim=	2013-10-05	9.4
226	3	10	1120	2	pegoopik	2017-10-14	9.3
307	2	19	1120	0	Baser	2017-06-29	8.5
80	2	346	1098	10	qwrqwr	2011-10-21	9.0
177	1	53	1004	0	pegoopik	2011-07-17	8.5
170	2	55	982	1	qwrqwr	2010-10-24	9.0
124	2	380	970	3	DimaN	2004-02-26	8.3
66	3	676	954	54	anddros	2009-12-26	8.5
32	1	1386	921	7	Roman Golubin	2005-12-13	7.5
260	2	52	913	0	qwrqwr	2012-02-03	7.7
202	2	29	911	0	qwrqwr	2013-11-01	9.1
114	1	453	901	4	Serge I	2003-12-24	8.4
40	1	322	899	10	Serge I	2018-09-07	7.0
201	2	38	806	0	Baser	2013-09-21	8.7
129	2	275	769	7	DimaN	2004-03-01	7.5
305	1	25	732	0	Baser	2017-01-06	9.0
23	3	1576	690	124	Palkin	2007-03-29	8.4
43	2	546	689	4	qwrqwr	2015-04-24	8.4
91	2	228	672	1	smog	2012-05-26	9.1
192	2	48	608	0	Baser	2012-03-03	9.2
103	1	143	599	1	Baser	2013-10-05	7.4
82	3	392	590	12	_Virt_	2010-04-27	8.2
118	2	429	560	1	Fiolent	2004-01-05	8.2
75	2	404	559	4	qwrqwr	2011-07-22	7.5
67	2	587	556	17	Ozzy	2010-04-27	8.3
68	3	298	537	25	pegoopik	2014-08-01	8.1
47	3	971	518	14	qwrqwr	2010-11-20	8.1
60	3	2081	515	119	Serge I	2005-03-05	7.8
54	2	1359	507	45	Ozzy	2008-09-06	8.2
37	3	784	500	25	qwrqwr	2013-02-22	8.0
41	3	1140	488	18	qwrqwr	2010-04-26	8.1
79	1	972	485	14	Serge I	2003-06-05	7.7
69	2	178	462	7	Gosha	2017-12-15	9.1
35	3	600	421	13	Baser	2015-09-18	8.7
86	2	353	390	0	Ozzy	2010-03-05	8.6
109	2	496	385	1	VIG	2003-12-23	8.0
78	2	422	358	5	_ORA_	2010-04-27	7.5
51	1	579	358	15	Fiolent	2004-06-23	8.2
59	2	933	327	6	VIG	2003-12-22	8.3
63	1	1351	324	5	VIG	2003-06-05	7.6
73	1	464	322	3	Ruslan1707	2010-11-02	7.5
38	2	1053	319	25	ZrenBy	2003-09-01	7.5
34	2	1197	316	27	qwrqwr	2010-09-24	7.9
90	1	240	316	1	Dmitrij Grinkevich	2012-03-03	7.9
44	2	758	289	8	Serge I	2011-11-25	7.9
61	2	982	286	6	risp	2009-12-26	8.5
12	1	444	280	47	Serge I	2019-04-12	7.2
25	2	1253	275	29	DimaN	2004-06-22	7.1
97	1	371	271	3	dimzv	2004-03-01	7.7
74	2	674	268	8	vlksm	2008-06-21	8.3
46	2	1215	257	128	Serge I	2009-08-12	6.8
236	1	10	253	0	Baser	2021-07-24	9.6
104	1	143	247	0	pegoopik	2013-07-19	8.4
113	1	137	227	0	smog	2013-03-29	8.5
33	2	1280	225	27	DimaN	2004-03-01	7.6
128	1	230	224	4	inkerman	2007-09-14	8.4
55	2	581	219	6	VIG	2005-06-26	7.7
6	2	2088	212	102	Serge I	2005-05-07	8.0
17	2	1672	208	24	VIG	2003-04-29	8.2
95	1	98	208	2	qwrqwr	2017-12-01	9.4
83	2	540	173	6	lepton	2006-09-29	8.5
18	1	1652	173	10	ZrenBy	2003-09-01	7.7
70	1	679	169	3	Serge I	2009-04-17	7.9
9	2	1438	168	31	vasia armor	2010-05-21	8.0
50	1	552	155	18	mslava	2003-12-23	7.2
94	2	258	153	0	pickman	2011-04-27	8.3
30	1	1774	138	3	Serge I	2003-08-28	7.9
81	2	601	136	12	$erges	2008-05-10	8.3
112	1	43	131	2	Gosha	2020-06-03	9.0
56	1	1070	126	3	Fiolent	2004-06-22	8.0
52	1	518	125	3	Serge I	2015-01-10	8.6
36	3	1051	122	23	risp	2011-05-06	8.0
16	2	932	116	60	qwrqwr	2014-07-18	7.5
42	1	1636	110	14	Serge I	2003-06-05	7.7
21	1	1228	105	9	paparome	2006-03-14	8.1
13	1	1759	99	22	ZrenBy	2003-09-01	7.5
39	2	1397	98	24	Serge I	2003-08-28	7.5
53	1	1483	98	25	DimaN	2004-03-01	7.6
28	1	1235	94	10	ZrenBy	2003-09-01	7.6
14	1	2477	88	37	Serge I	2003-04-08	7.5
24	2	1643	86	6	Aaz	2004-02-26	7.0
29	2	1101	82	39	GiBis	2011-09-17	7.5
31	1	1068	64	6	Fiolent	2004-06-22	7.9
306	1	9	64	0	Baser	2022-04-29	7.4
117	1	431	57	0	Fiolent	2003-12-26	7.6
8	2	1529	50	93	Serge I	2008-06-21	7.6
7	1	238	45	86	Baser	2021-02-27	8.0
238	2	5	44	0	Baser	2022-05-13	8.0
48	1	1177	43	6	Serge I	2009-06-22	7.4
11	1	1939	42	16	ZrenBy	2003-09-01	7.5
22	1	1642	40	12	ZrenBy	2003-09-01	7.3
27	1	1300	36	8	Fiolent	2004-02-26	7.3
10	1	768	25	50	Serge I	2017-01-20	8.0
15	1	1239	24	8	Dmitrij Grinkevich	2012-04-21	7.6
88	2	33	15	1	Serge I	2021-10-15	9.1
301	0	43	7	0	pegoopik	2012-03-23	8.9

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