Recent leaders activity at "SQL Exercises"

SQL exercises

October 06, 11:54 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.
NOTE: Your browser should support Cookies and Javascript to provide correct usage of this site. If you use content filter, it should allow opening child windows to explore help pages.

  • Top 100
  • Top 100 on latest exercises
  • "Liberal" rating
  • Olympic rating
  • TOP 100 of Learning Stage
  • Rating by summation of ranks
  • Top 10 (photos)
  • Last-week results
  • Rating of second-stage exercises (average)
  • Rating of 2nd-stage exercises (median)
  • Author's rating  • 2nd stage rating up to exercise:
   enter No 
  • Rating on the exercise:
   enter No
  • Optimistic rating
   enter factor

  • Today statistics
  • Site's old residents
  • Recent leaders activity
  • Сhanges in exercises' TOP 10
  • Results' chart

SQL exercises

  • Site rules
  • SELECT (learning stage)
  • SELECT (learning stage,
      choosing DBMS)
  • SELECT (rating stages)
  • DML 
  • Transact-SQL tests
  • Data simulation
  • Data simulation (DML);
  • Visual simulation (painting)
  • Exercises voting (SELECT)
  • Exercises voting (DML)

  • Learning stage
  • Rating stages
  • Favorites
  • Search
  • Blogs

Certification

  • About certification
  • Certified professionals
  • Statistics
  • Statistics over regions (map)
  • Confirm certificate

HELP

Query optimization

Developers & Thanks

For employers

Support SQL-EX.RU

Recent leaders activity

Rating - rating position;
3rd score - number of points earned on the third stage;
Ex - exercise's number;
Start - time when the exercise was started;
Finish - time when the exercise was solved;
S_time (min) - time in minutes spent for solving the exercise

Involved in rating: 13882

No	Person	Rating	3rd score	Ex	Start	Finish	S_time (min)
1	Safronov P.A. (Paulus73)	135	0	138	2026-10-06 09:41:15		133
2	Filippkin D.V. (_dimon_)	3	259	240	2026-10-05 14:13:38		1301
3	Safronov P.A. (Paulus73)	135	0	53	2026-10-05 09:54:21	2026-10-05 12:48:36	174
4	Vinogradova S.M. (Tigra1)	124	4	140	2026-10-04 15:59:22	2026-10-05 11:25:11	1166
5	Vinogradova S.M. (Tigra1)	124	4	139	2026-10-03 08:58:36	2026-10-03 17:36:51	518
6	Filippkin D.V. (_dimon_)	3	259	53	2026-10-02 10:34:22	2026-10-02 13:34:56	181
7	Kostomarov A.V. (al29)	5	247	53	2026-09-30 08:53:59		8821
8	Vinogradova S.M. (Tigra1)	124	4	53	2026-09-27 16:28:34	2026-09-27 18:57:12	149
9	Sigankov V.I. (vasilyvanc)	33	74	53	2026-09-23 14:18:31	2026-09-27 11:56:35	5618
10	Sarkis'yan G. (gennadi_s)	14	187	303	2026-09-26 14:18:02	2026-09-26 14:40:37	23
11	Koptel'tsev V. (selber)	19	133	53	2026-09-20 05:35:11	2026-09-23 22:59:05	5364
12	Koptel'tsev V. (selber)	19	133	183	2026-09-07 08:11:06		41983
13	Komarov A.N. (Shveda Saulya)	35	68	165	2026-08-28 13:41:52		56053
14	Koptel'tsev V. (selber)	19	133	188	2026-08-21 06:33:00		66562
15	Williams B. (BW)	36	67	252	2026-07-31 13:33:49		96381
16	Williams B. (BW)	36	67	264	2026-07-29 13:21:27		99273
17	Sigankov V.I. (vasilyvanc)	33	74	216	2026-07-23 12:13:08		107981
18	Sigankov V.I. (vasilyvanc)	33	74	241	2026-07-21 14:05:13		110749
19	Zajtsev V.S. (Sleeping)	22	118	241	2026-06-16 18:38:55		160876
20	Chernov D.V. (Kursist)	2	262	241	2026-05-23 20:49:50		195305
21	Polyakov V.M. (rock_4)	76	15	173	2026-04-30 11:45:12		228969
22	Polyakov V.M. (rock_4)	76	15	164	2026-04-23 09:17:13		239197
23	Vyazovetskov A.S. (alex_v)	6	245	264	2026-04-22 19:15:17		240039
24	Polyakov V.M. (rock_4)	76	15	148	2026-04-01 11:23:28		270751
25	Petrov Y. (YuriPetrov)	32	78	210	2026-01-26 17:36:12		363978
26	Lukov D.R. (Gendalf)	247	0	32	2025-12-05 01:36:21		439818
27	Chebykin D. (GriGrim)	39	62	210	2025-07-11 01:12:59		651522
28	Chuvstvin M. (chuvstvinmaxim)	89	11	141	2025-01-29 11:09:56		885645
29	Chuvstvin M. (chuvstvinmaxim)	89	11	258	2025-01-21 00:01:28		897833
30	Lyubomudrov R.G. (born2tilt)	71	22	162	2024-10-10 07:48:40		1045686
31	Lyubomudrov R.G. (born2tilt)	71	22	202	2024-10-09 10:00:37		1046994
32	Frolov K.A. (Murderface_)	136	0	138	2024-09-23 14:49:59		1069745
33	Zajtsev V.S. (Sleeping)	22	118	164	2024-07-09 13:11:22		1179283
34	Slavutinskij V.V. (Vasilko)	456	0	5	2024-04-22 17:26:35		1291348
35	Slavutinskij V.V. (Vasilko)	456	0	7	2024-04-22 17:26:21		1291348
36	Williams B. (BW)	36	67	141	2024-04-02 11:30:28		1320504
37	Kukushkin S.A. (smog)	16	153	194	2024-03-15 01:29:39		1347025
38	Latyntsev N.G. (aks_nsk)	54	37	253	2024-03-05 14:17:51		1360657
39	Kurbanoff N.I. (Nariman Kurbanoff)	100	9	305	2024-01-19 17:35:31		1426699
40	Kurbanoff N.I. (Nariman Kurbanoff)	100	9	306	2024-01-17 10:21:39		1430013
41	Kurbanoff N.I. (Nariman Kurbanoff)	100	9	71	2024-01-15 18:32:03		1432403
42	Nikolaenko A.V. (Shadow77)	84	14	135	2023-12-24 02:07:10		1465067
43	Boiko D. (Angellore)	9	233	262	2023-11-17 19:04:36		1517330
44	Rudikov E. (cubie)	137	0	138	2023-10-31 17:27:54		1541907
45	Shkarednyj I.N. (Gosha)	37	66	198	2023-03-25 21:10:27		1858484
46	Latyntsev N.G. (aks_nsk)	54	37	255	2023-01-12 16:01:39		1962473
47	Koptel'tsev V. (selber)	19	133	237	2022-11-06 21:16:51		2058638
48	Borisenkov D.V. (xuser)	99	9	173	2022-10-10 15:48:20		2097846
49	Lukov D.R. (Gendalf)	247	0	90	2022-07-21 11:18:50		2214756
50	Pavlov A.V. (Anton)	60	29	141	2022-04-10 16:17:39		2361337
51	Sigankov V.I. (vasilyvanc)	33	74	161	2021-10-17 20:21:01		2613094
52	Fedevych V.I. (labuch_fedev)	38	65	221	2021-07-20 17:09:05		2741446
53	Pusev D.V. (Pusev_Denis)	18	134	234	2021-04-18 09:55:08		2875799
54	Kukushkin S.A. (smog)	16	153	12	2021-03-20 02:48:36		2917986
55	Pusev D.V. (Pusev_Denis)	18	134	159	2021-03-17 12:21:10		2921733
56	Kozharinov A. (bubala)	213	0	10	2020-09-30 09:55:07		3163799
57	Samarin A. (not.yet.sql.master)	148	0	112	2020-08-14 15:12:10		3231162
58	Koptel'tsev V. (selber)	19	133	259	2020-06-24 00:22:07		3305492
59	Samarin A. (not.yet.sql.master)	148	0	138	2020-05-09 21:48:04		3370447
60	Karasyova N.V. (vlksm)	10	225	230	2020-05-04 08:57:25		3378417
61	Fedevych V.I. (labuch_fedev)	38	65	226	2020-04-06 22:22:48		3417932
62	Pusev D.V. (Pusev_Denis)	18	134	184	2020-03-21 10:55:32		3441659
63	Fokin A. (Vizitor )	44	52	263	2019-08-18 21:46:14		3752048
64	Bazavluk M. (DoNotLook)	97	9	141	2019-07-30 23:04:12		3779330
65	Romanov K.Yu. (kostik)	313	0	12	2019-07-25 08:42:10		3787392
66	Kordyum A. (alko58)	231	0	12	2019-07-12 15:58:52		3805676
67	Pavlov A.V. (Anton)	60	29	168	2019-06-12 01:20:21		3849754
68	Mal'tsev A.V. (Palkin)	112	8	218	2019-03-06 20:25:17		3989729
69	Kurochkin P.A. (qwrqwr)	12	211	227	2018-12-28 14:37:25		4087997
70	Grishunin M.F. (MikhailFG)	93	10	144	2018-12-26 09:36:27		4091178
71	Shindin A.V. (AlShin)	25	99	45	2018-09-18 15:45:28		4233369
72	Skorohod I. (Dracul4ik)	79	15	45	2018-08-07 14:38:23		4293916
73	Voevutskij S.A. (SergLK)	219	0	45	2018-07-01 13:19:14		4347275
74	Zyrin V.E. (Vezyr)	553	0	29	2018-05-29 14:14:19		4394740
75	Chebykin D. (GriGrim)	39	62	228	2018-03-26 15:47:45		4486807
76	Shkarednyj I.N. (Gosha)	37	66	151	2018-03-23 22:38:32		4490716
77	Boiko D. (Angellore)	9	233	229	2018-03-23 21:19:51		4490795
78	Azbel' E.G. (enull)	78	15	148	2018-03-08 04:10:21		4513424
79	Shkarednyj I.N. (Gosha)	37	66	147	2018-02-26 08:13:30		4527581
80	F (uff)	65	25	95	2018-01-22 15:57:03		4577518
81	Aliev R. (y4nzi)	27	95	259	2017-12-17 18:48:39		4629186
82	Kordyum A. (alko58)	231	0	101	2017-11-21 18:18:43		4666656
83	Zajtsev V.S. (Sleeping)	22	118	190	2017-11-20 12:57:31		4668417
84	Aliev R. (y4nzi)	27	95	257	2017-11-19 19:09:17		4669485
85	Aliev R. (y4nzi)	27	95	255	2017-10-24 14:34:21		4707200
86	Kukushkin S.A. (smog)	16	153	171	2017-10-05 18:37:27		4734317
87	Skorohod I. (Dracul4ik)	79	15	156	2017-09-12 19:34:33		4767380
88	Grinkevich D.L. (Dmitrij Grinkevich)	23	109	115	2017-07-21 14:09:37		4844025
89	Bezhaev A.Yu. (Baser)	8	236	220	2017-06-19 06:24:54		4890570
90	Vorob'ev E.V. (Johnnymnemonic)	165	0	138	2017-06-16 09:15:49		4894719
91	F (uff)	65	25	185	2017-06-01 10:27:49		4916247
92	Skorohod I. (Dracul4ik)	79	15	146	2017-05-04 17:54:53		4956120
93	Movlyanov A.P. (Oct)	13	193	218	2017-03-22 18:23:50		5018011
94	Skorohod I. (Dracul4ik)	79	15	144	2016-10-10 15:20:14		5252914
95	Sysoev A.V. (Sysa)	50	39	165	2016-09-16 00:07:24		5288387
96	Sysoev A.V. (Sysa)	50	39	168	2016-07-22 23:44:07		5367610
97	Karasyova N.V. (vlksm)	10	225	263	2016-04-23 11:28:43		5497946
98	Titovskij P.S. (kli3ma)	47	45	164	2016-03-25 05:49:30		5540045
99	Sivoglazov M.A. (Gaizenberg)	66	24	127	2015-11-28 14:08:52		5709466
100	Maslyaev V.S. (Velmont)	91	11	170	2015-11-06 14:01:20		5741153

Home
Week news

Certification

SQL exercises

HELP

Performance

Profile
References

Copyright SQL-EX © 2002-2026. All rights reserved.
contact