Author's rating on SQL Exercises site

June 04, 21:14 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	Krasovskij E.A. (pegoopik)	25	944	20966	524150	8.9	529
2	Bezhaev A.Yu. (Baser)	21	923	19506	409626	8.5	504
3	Zotov P.G. (Ozzy)	20	1092	16768	335360	8.4	1650
4	Drozdkov A.N. (anddros)	15	698	20780	311700	8.4	1167
5	Kurochkin P.A. (qwrqwr)	29	628	8300	240700	8.2	2697
6	Karasyova N.V. (vlksm)	9	949	22844	205596	8.8	458
7	Vojnov P.E. (paparome)	6	739	17377	104262	8.6	744
8	Sal'nikov S.A. ($erges)	6	822	15490	92940	8.7	411
9	Chebykin D.N. (GriGrim)	4	733	18988	75952	8.9	153
10	Latyntsev N.G. (aks_nsk)	1	1132	63065	63065	9.3	15
11	Grinkevich D.L. (Dmitrij Grinkevich)	6	600	10262	61572	7.6	719
12	Radar Yu.V. (inkerman)	2	887	27386	54772	8.5	99
13	Utyonkov M.N. (=Maxim=)	3	897	17226	51678	8.7	68
14	Kuvalkin K.S. (Cyrilus)	2	782	25353	50706	9.2	130
15	Dvoryaninov V.(Valdaj)	1	1559	45715	45715	8.4	21
16	Koptel'tsev V.(selber)	4	1113	10555	42220	8.7	153
17	Fomichev A.V. (Fomichev)	1	1495	37829	37829	7.0	19
18	Maslyaev V.S. (Velmont)	1	703	21673	21673	9.7	48
19	Pechatnov V.V. (pvv)	3	876	6457	19371	8.3	127
20	Moiseenko S.I. (Serge I)	20	299	917	18340	7.7	5131
21	Nikotin V.M. (@Nikotin)	1	909	17228	17228	8.5	20
22	Kostomarov A.V. (al29)	3	1181	5052	15156	9.7	16
23	Filippkin D.V. (_dimon_)	1	483	8867	8867	10.0	11
24	Yuldashev M.R. (Snowbear)	2	924	4315	8630	8.7	150
25	Doschenko V.N. (mcrain)	2	1464	4252	8504	8.1	8
26	Yakutin N.V. (ZrenBy)	8	333	987	7896	7.5	2078
27	Makarov I.A. (_Bkmz_)	2	724	3464	6928	8.1	187
28	Gershovich V.(VIG)	7	291	978	6846	7.9	1525
29	Valuev D.I. (Fiolent)	8	416	649	5192	7.8	1230
30	Boiko D.(Angellore)	1	332	5098	5098	9.4	16
31	Shuravin E.P. (dumkan)	1	509	4995	4995	7.9	101
32	Gorbunov A.V. (risp)	3	1356	1565	4695	8.2	643
33	Deev A.V. (pickman)	2	1193	2222	4444	8.2	131
34	Golubin R.S. (Roman Golubin)	2	494	1780	3560	8.2	459
35	Chernov D.V. (Kursist)	2	1063	1519	3038	9.2	6
36	Novikov D.A. (DimaN)	5	381	465	2325	7.5	1122
37	Zverev D.L. (dimzv)	2	378	937	1874	8.2	157
38	Sribnyak A.(silver)	1	949	1420	1420	8.8	169
39	Pyrkin S.(crescent)	1	521	1106	1106	8.9	106
40	Kukushkin S.A. (smog)	2	569	421	842	8.9	133
41	Mal'tsev A.V. (Palkin)	1	249	691	691	8.4	353
42	Vanin V.(_Virt_)	1	1780	580	580	8.2	133
43	Mikhajlov V.G. (mslava)	2	413	262	524	7.9	247
44	Shkarednyj I.N. (Gosha)	2	301	242	484	9.1	48
45	Ostapchuk A.B. (_ORA_)	1	451	357	357	7.5	122
46	Yunusov R.N. (Ruslan1707)	1	367	319	319	7.4	141
47	Murashkin I.V. (lepton)	1	798	172	172	8.4	139
48	Chobitok V.(vasia armor)	1	510	166	166	7.9	373
49	Petrov D.B. (GiBis)	1	695	78	78	7.5	315
50	Muravejko O.Yu. (Aaz)	1	631	77	77	6.9	434

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