Rating of second-stage exercises on SQL Exercises

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September 09, 09:17 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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Poll

For what DBMS, besides SQL Server, you would like to have exercises on the site?

Oracle	57%
MySQL	27.8%
PostgreSQL	7.6%
Nothing is necessary any more	4%
Another	3.7%

Total Votes: 11654

Rating of second-stage exercises

No - exercise number; Bonus - level of difficulty;
Solved - number of visitors, who have solved this exercise;
Time(min) - the average time 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
251	4	48	54752	3	paparome	2006-10-01	6.6
165	2	5	51099	1	vlksm	2010-03-18	10.0
149	3	16	47146	2	$erges	2008-09-08	9.9
157	3	9	40892	2	anddros	2009-06-05	7.7
138	4	88	32705	26	Cyrilus	2005-12-09	9.4
151	3	18	18920	2	anddros	2008-12-30	9.6
121	3	270	18752	4	ZrenBy	2004-02-26	7.3
143	5	21	16696	11	inkerman	2007-10-07	8.8
161	3	7	14746	3	Ozzy	2009-11-06	9.4
62	1	880	13489	15	Serge I	2004-06-23	7.2
163	3	7	12433	0	Ozzy	2010-01-08	9.3
153	3	15	12353	3	Ozzy	2009-02-14	9.3
155	3	9	10681	3	vlksm	2009-04-17	10.0
106	3	117	9925	5	vlksm	2008-11-27	8.9
253	3	18	8942	5	$erges	2008-05-17	10.0
147	4	4	7246	0	$erges	2010-08-06	10.0
252	2	19	7171	2	Ozzy	2009-06-14	6.6
152	3	21	6682	2	vlksm	2009-01-05	9.8
167	3	3	6060	2	qwrqwr	2010-07-28	10.0
139	2	70	5807	2	Snowbear	2006-09-09	8.2
154	4	9	5567	3	anddros	2009-03-18	10.0
144	4	22	5347	2	pvv	2008-01-01	8.0
160	3	11	5271	1	Ozzy	2009-08-07	9.4
132	3	25	5234	1	risp	2010-01-25	8.3
137	4	127	5118	22	Cyrilus	2005-03-06	9.3
146	3	28	4355	2	paparome	2008-01-22	9.9
116	4	90	4150	16	$erges	2008-12-13	9.5
123	3	103	4114	44	Ozzy	2009-08-22	8.9
150	4	18	4062	2	@Nikotin	2008-11-09	9.3
159	3	8	3922	0	anddros	2009-08-24	8.8
126	3	82	3706	5	$erges	2008-09-07	8.7
164	2	10	3439	1	anddros	2010-04-26	9.7
65	2	154	2940	25	Ozzy	2010-01-29	7.9
148	2	24	2645	7	vlksm	2008-09-06	9.1
141	4	43	2634	5	vlksm	2006-10-29	9.1
98	3	380	2633	37	ZrenBy	2003-09-01	8.1
96	3	191	2626	88	anddros	2008-11-22	8.3
158	3	7	2290	0	Ozzy	2010-04-09	9.5
145	3	38	2089	1	pvv	2008-01-07	8.9
156	2	21	1737	2	anddros	2009-04-17	9.6
100	3	34	1692	2	qwrqwr	2010-04-27	9.6
87	3	395	1594	77	Roman Golubin	2006-07-14	9.3
72	3	664	1585	140	paparome	2005-12-03	9.2
162	2	14	1394	1	Ozzy	2009-12-26	9.6
110	3	277	1199	9	Snowbear	2006-03-14	8.8
169	3	2	1076	0	Valdaj	2010-09-02	10.0
140	2	23	1018	0	_Bkmz_	2010-01-30	8.8
69	2	466	1015	8	Roman Golubin	2005-12-13	7.6
142	2	63	994	0	paparome	2007-03-24	8.7
125	3	234	875	5	dimzv	2004-02-29	8.6
85	3	76	842	5	Ozzy	2009-10-10	8.1
68	2	700	819	97	Palkin	2007-03-29	8.2
118	2	283	707	2	Fiolent	2004-01-05	8.3
134	3	102	704	3	pvv	2008-01-22	8.5
88	1	188	685	1	$erges	2008-09-06	6.2
89	3	185	673	23	_Bkmz_	2008-06-21	8.2
168	2	2	645	2	qwrqwr	2010-08-27	10.0
114	3	298	594	5	Serge I	2003-12-24	8.3
122	3	249	586	11	Fiolent	2004-02-26	7.6
109	3	335	566	1	VIG	2003-12-23	7.8
76	2	87	507	5	silver	2010-01-23	8.5
129	3	185	504	7	DimaN	2004-03-01	7.6
130	2	18	503	0	anddros	2010-05-22	10.0
67	3	87	469	10	Ozzy	2010-04-27	8.0
84	2	109	453	11	Ozzy	2009-12-26	7.9
74	2	304	446	11	vlksm	2008-06-21	8.0
166	1	15	405	0	anddros	2010-07-26	9.1
60	1	1343	393	120	Serge I	2005-03-05	7.0
136	3	163	389	0	Fiolent	2004-06-23	7.7
66	2	171	368	32	anddros	2009-12-26	7.9
111	3	299	327	3	Fiolent	2005-01-19	8.4
92	2	339	312	9	paparome	2006-07-26	8.4
124	3	241	307	2	DimaN	2004-02-26	8.0
54	1	565	306	49	Ozzy	2008-09-06	7.9
63	3	1315	282	74	Serge I	2003-04-08	8.0
97	2	429	266	1	ZrenBy	2003-09-01	7.4
75	3	728	254	9	VIG	2003-04-29	7.6
112	2	280	252	4	VIG	2005-06-26	7.2
82	2	55	248	1	_Virt_	2010-04-27	7.4
128	2	133	217	5	inkerman	2007-09-14	8.3
71	2	120	213	5	anddros	2009-12-26	8.9
103	3	354	205	1	VIG	2003-12-22	8.2
79	2	656	203	14	Serge I	2003-06-05	7.0
86	1	52	203	0	Ozzy	2010-03-05	9.2
107	2	264	198	3	lepton	2006-09-29	8.3
49	1	368	196	22	anddros	2009-06-05	7.3
52	1	913	191	26	mslava	2003-09-01	6.5
115	3	296	184	1	Serge I	2003-12-26	7.8
50	1	1085	182	34	Serge I	2003-04-09	6.5
64	2	1115	172	15	Serge I	2005-05-07	7.1
42	2	759	172	9	Serge I	2003-06-05	6.7
77	2	449	169	11	yuriy.rozhok	2007-03-24	7.7
133	1	171	133	0	DimaN	2004-06-22	6.4
81	2	278	132	13	$erges	2008-05-10	7.7
45	2	166	125	1	vasia armor	2010-05-21	7.0
90	3	487	121	4	VIG	2003-09-01	7.3
83	2	605	118	2	Serge I	2003-08-28	6.5
40	2	728	117	3	Serge I	2003-08-28	7.0
113	2	257	105	0	paparome	2006-03-14	7.3
117	2	286	100	0	Fiolent	2003-12-26	6.8
95	2	293	100	1	Fiolent	2004-06-22	7.2
119	2	280	97	0	mslava	2004-01-05	7.1
57	2	1249	92	26	Serge I	2003-04-08	7.2
99	2	38	89	0	qwrqwr	2010-05-13	7.7
108	3	338	87	0	mslava	2003-12-23	7.0
93	2	465	85	0	ZrenBy	2003-09-01	7.0
70	1	246	84	3	Serge I	2009-04-17	7.8
78	2	61	83	1	_ORA_	2010-04-27	7.0
61	2	186	81	3	risp	2009-12-26	8.1
105	3	349	75	0	mslava	2003-12-22	8.1
41	1	188	73	27	qwrqwr	2010-04-26	7.4
127	2	207	63	2	dimzv	2004-03-01	7.0
102	2	361	60	1	ZrenBy	2003-09-01	6.2
131	1	176	59	1	Serge I	2004-06-22	6.3
51	1	155	59	4	qwrqwr	2010-05-01	6.8
43	1	442	51	2	Aaz	2004-02-26	6.1
135	1	119	51	0	Serge I	2007-09-07	7.4
58	1	1202	48	53	Serge I	2006-11-17	7.5
101	2	363	48	0	ZrenBy	2003-09-01	7.0
37	1	1395	47	56	paparome	2005-12-02	7.3
120	2	278	47	0	Fiolent	2004-02-26	5.7
39	1	605	46	0	ZrenBy	2003-09-01	6.5
53	1	698	44	28	DimaN	2004-03-01	7.3
94	2	455	44	1	ZrenBy	2003-09-01	6.4
104	2	351	41	1	VIG	2003-12-22	7.2
55	1	625	40	71	Serge I	2008-06-21	6.7
35	1	1454	38	17	Serge I	2003-04-08	6.4
73	2	227	36	1	Fiolent	2004-06-22	6.8
56	1	868	33	43	VIG	2003-09-01	6.0
44	1	472	32	2	ZrenBy	2003-09-01	6.2
80	2	639	32	4	VIG	2003-06-05	6.6
36	2	719	30	2	Serge I	2003-08-28	7.1
38	2	511	29	3	ZrenBy	2003-09-01	6.6
91	2	202	29	2	DimaN	2004-03-01	7.0
47	1	1372	27	18	Serge I	2005-01-19	6.1
48	1	338	26	7	Serge I	2009-06-22	6.9
46	1	358	24	126	Serge I	2009-08-12	5.9
59	1	141	19	0	qwrqwr	2010-04-26	7.2
33	1	1056	17	6	Serge I	2003-04-29	6.8
32	1	732	15	3	Serge I	2003-08-28	6.3
34	1	762	14	3	Serge I	2003-08-28	6.4

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