Author's rating on SQL Exercises site

April 15, 10:59 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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Author's rating for second-stage exercises

ex_num - number of exercises of a given author;
avg_length - the average wording length in symbols;
avg_time(min) - the average time (in minutes) which spent for solution of one exercise of a given author by the leaders of rating system (TOP 20);
rating - the average time (in minutes) which spent for solution of all the exercises of a given author by the leaders of rating system (TOP 20);
avg_ball - the average of points received by participants' voting over all exercises of an author;
num_vote - number of votes given for all problems of an author

No	author	ex_num	avg_length	avg_time(min)	rating	avg_ball	num_vote
1	Bezhaev A.Yu. (Baser)	23	876	31707	729261	8.6	534
2	Krasovskij E.A. (pegoopik)	25	944	21351	533775	8.9	548
3	Zotov P.G. (Ozzy)	20	1092	18560	371200	8.4	1677
4	Drozdkov A.N. (anddros)	15	698	21690	325350	8.5	1195
5	Kurochkin P.A. (qwrqwr)	29	628	8781	254649	8.2	2783
6	Karasyova N.V. (vlksm)	9	949	25148	226332	8.8	471
7	Sal'nikov S.A. ($erges)	6	822	18448	110688	8.7	420
8	Vojnov P.E. (paparome)	6	739	18172	109032	8.6	757
9	Chebykin D.N. (GriGrim)	4	733	19411	77644	8.9	161
10	Latyntsev N.G. (aks_nsk)	1	1132	63065	63065	9.3	15
11	Grinkevich D.L. (Dmitrij Grinkevich)	6	605	10261	61566	7.7	743
12	Radar Yu.V. (inkerman)	2	887	28701	57402	8.5	100
13	Kuvalkin K.S. (Cyrilus)	2	782	25400	50800	9.2	132
14	Utyonkov M.N. (=Maxim=)	3	897	16900	50700	8.7	68
15	Dvoryaninov V.(Valdaj)	1	1559	45744	45744	8.4	21
16	Koptel'tsev V.(selber)	4	1113	10376	41504	8.8	165
17	Fomichev A.V. (Fomichev)	1	1495	37829	37829	7.0	19
18	Maslyaev V.S. (Velmont)	1	703	20891	20891	9.6	53
19	Pechatnov V.V. (pvv)	3	876	6581	19743	8.3	128
20	Moiseenko S.I. (Serge I)	19	309	960	18240	7.7	4947
21	Nikotin V.M. (@Nikotin)	1	909	18162	18162	8.5	21
22	Kostomarov A.V. (al29)	3	1181	5052	15156	9.7	16
23	Yuldashev M.R. (Snowbear)	2	924	4351	8702	8.7	155
24	Doschenko V.N. (mcrain)	2	1464	4252	8504	8.1	8
25	Filippkin D.V. (_dimon_)	1	483	8415	8415	10.0	11
26	Yakutin N.V. (ZrenBy)	8	330	995	7960	7.5	2144
27	Makarov I.A. (_Bkmz_)	2	724	3466	6932	8.1	189
28	Gershovich V.(VIG)	7	292	981	6867	7.9	1594
29	Valuev D.I. (Fiolent)	8	416	662	5296	7.8	1282
30	Boiko D.(Angellore)	1	332	4938	4938	9.4	16
31	Gorbunov A.V. (risp)	3	1356	1576	4728	8.2	661
32	Shuravin E.P. (dumkan)	1	509	4707	4707	8.0	109
33	Deev A.V. (pickman)	2	1193	2238	4476	8.2	135
34	Golubin R.S. (Roman Golubin)	2	494	1787	3574	8.2	472
35	Chernov D.V. (Kursist)	2	1009	1554	3108	9.3	28
36	Novikov D.A. (DimaN)	5	381	467	2335	7.5	1151
37	Zverev D.L. (dimzv)	2	378	940	1880	8.2	163
38	Sribnyak A.(silver)	1	949	1637	1637	8.8	172
39	Pyrkin S.(crescent)	1	521	1166	1166	8.9	107
40	Kukushkin S.A. (smog)	2	569	425	850	8.9	140
41	Mal'tsev A.V. (Palkin)	1	249	690	690	8.4	360
42	Shkarednyj I.N. (Gosha)	2	301	305	610	9.0	67
43	Vanin V.(_Virt_)	1	1780	590	590	8.2	136
44	Mikhajlov V.G. (mslava)	2	413	277	554	8.0	264
45	Ostapchuk A.B. (_ORA_)	1	451	358	358	7.4	123
46	Yunusov R.N. (Ruslan1707)	1	367	322	322	7.4	145
47	Murashkin I.V. (lepton)	1	798	173	173	8.5	142
48	Chobitok V.(vasia armor)	1	498	168	168	7.9	390
49	Yakovlev M.V. (MikhailYakovlev535)	1	1634	153	153	6.3	7
50	Muravejko O.Yu. (Aaz)	1	631	86	86	6.9	442
51	Petrov D.B. (GiBis)	1	695	82	82	7.5	327

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