Recent leaders activity at "SQL Exercises"

SQL exercises

February 20, 17:41 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: 15437

No	Person	Rating	3rd score	Ex	Start	Finish	S_time (min)
1	Polyakov V.M. (rock_4)	134	0	138	2026-02-20 17:03:21		38
2	Polyakov V.M. (rock_4)	134	0	137	2026-02-13 11:01:59	2026-02-20 16:48:54	10427
3	Komarov A.N. (Shveda Saulya)	41	59	157	2024-09-04 13:29:47	2026-02-19 14:50:22	767601
4	Polyakov V.M. (rock_4)	134	0	135	2026-02-09 12:37:00	2026-02-13 10:46:31	5650
5	Komarov A.N. (Shveda Saulya)	41	59	150	2023-11-22 17:11:28	2026-02-13 01:49:19	1171238
6	Sarkis'yan G. (gennadi_s)	16	149	194	2026-02-10 15:42:58		14519
7	Polyakov V.M. (rock_4)	134	0	134	2026-01-29 14:49:41	2026-02-09 11:35:19	15646
8	Petrov Y. (YuriPetrov)	32	78	210	2026-01-26 17:36:12		36006
9	Lukov D.R. (Gendalf)	244	0	32	2025-12-05 01:36:21		111845
10	Chebykin D. (GriGrim)	38	62	210	2025-07-11 01:12:59		323549
11	Williams B. (BW)	35	66	262	2025-04-17 12:32:37		445269
12	Filippkin D.V. (_dimon_)	3	259	263	2025-02-19 11:18:04		527424
13	Chuvstvin M. (chuvstvinmaxim)	88	11	141	2025-01-29 11:09:56		557672
14	Chuvstvin M. (chuvstvinmaxim)	88	11	258	2025-01-21 00:01:28		569860
15	Lyubomudrov R.G. (born2tilt)	71	22	162	2024-10-10 07:48:40		717713
16	Lyubomudrov R.G. (born2tilt)	71	22	202	2024-10-09 10:00:37		719021
17	Frolov K.A. (Murderface_)	133	0	138	2024-09-23 14:49:59		741772
18	Zajtsev V.S. (Sleeping)	22	112	164	2024-07-09 13:11:22		851310
19	Slavutinskij V.V. (Vasilko)	453	0	5	2024-04-22 17:26:35		963375
20	Slavutinskij V.V. (Vasilko)	453	0	7	2024-04-22 17:26:21		963375
21	Williams B. (BW)	35	66	141	2024-04-02 11:30:28		992531
22	Kukushkin S.A. (smog)	15	153	194	2024-03-15 01:29:39		1019052
23	Latyntsev N.G. (aks_nsk)	53	37	253	2024-03-05 14:17:51		1032684
24	Kurbanoff N.I. (Nariman Kurbanoff)	99	9	305	2024-01-19 17:35:31		1098726
25	Kurbanoff N.I. (Nariman Kurbanoff)	99	9	306	2024-01-17 10:21:39		1102040
26	Kurbanoff N.I. (Nariman Kurbanoff)	99	9	71	2024-01-15 18:32:03		1104430
27	Nikolaenko A.V. (Shadow77)	83	14	135	2023-12-24 02:07:10		1137095
28	Boiko D. (Angellore)	8	233	262	2023-11-17 19:04:36		1189357
29	Rudikov E. (cubie)	135	0	138	2023-10-31 17:27:54		1213934
30	Zajtsev V.S. (Sleeping)	22	112	150	2023-04-18 11:40:16		1496522
31	Shkarednyj I.N. (Gosha)	36	66	198	2023-03-25 21:10:27		1530511
32	Latyntsev N.G. (aks_nsk)	53	37	255	2023-01-12 16:01:39		1634500
33	Koptel'tsev V. (selber)	21	119	237	2022-11-06 21:16:51		1730665
34	Borisenkov D.V. (xuser)	98	9	173	2022-10-10 15:48:20		1769873
35	Lukov D.R. (Gendalf)	244	0	90	2022-07-21 11:18:50		1886783
36	Pavlov A.V. (Anton)	60	29	141	2022-04-10 16:17:39		2033364
37	Sigankov V.I. (vasilyvanc)	33	74	161	2021-10-17 20:21:01		2285121
38	Fedevych V.I. (labuch_fedev)	37	65	221	2021-07-20 17:09:05		2413473
39	Pusev D.V. (Pusev_Denis)	18	134	234	2021-04-18 09:55:08		2547827
40	Kukushkin S.A. (smog)	15	153	12	2021-03-20 02:48:36		2590013
41	Pusev D.V. (Pusev_Denis)	18	134	159	2021-03-17 12:21:10		2593761
42	Kozharinov A. (bubala)	209	0	10	2020-09-30 09:55:07		2835827
43	Samarin A. (not.yet.sql.master)	144	0	112	2020-08-14 15:12:10		2903190
44	Koptel'tsev V. (selber)	21	119	259	2020-06-24 00:22:07		2977520
45	Samarin A. (not.yet.sql.master)	144	0	138	2020-05-09 21:48:04		3042474
46	Karasyova N.V. (vlksm)	9	225	230	2020-05-04 08:57:25		3050444
47	Fedevych V.I. (labuch_fedev)	37	65	226	2020-04-06 22:22:48		3089959
48	Pusev D.V. (Pusev_Denis)	18	134	184	2020-03-21 10:55:32		3113686
49	Fokin A. (Vizitor )	44	52	263	2019-08-18 21:46:14		3424076
50	Bazavluk M. (DoNotLook)	96	9	141	2019-07-30 23:04:12		3451358
51	Romanov K.Yu. (kostik)	309	0	12	2019-07-25 08:42:10		3459420
52	Kordyum A. (alko58)	227	0	12	2019-07-12 15:58:52		3477703
53	Pavlov A.V. (Anton)	60	29	168	2019-06-12 01:20:21		3521781
54	Mal'tsev A.V. (Palkin)	111	8	218	2019-03-06 20:25:17		3661757
55	Kurochkin P.A. (qwrqwr)	11	211	227	2018-12-28 14:37:25		3760024
56	Grishunin M.F. (MikhailFG)	92	10	144	2018-12-26 09:36:27		3763205
57	Shindin A.V. (AlShin)	25	99	45	2018-09-18 15:45:28		3905396
58	Skorohod I. (Dracul4ik)	78	15	45	2018-08-07 14:38:23		3965943
59	Voevutskij S.A. (SergLK)	215	0	45	2018-07-01 13:19:14		4019303
60	Zyrin V.E. (Vezyr)	544	0	29	2018-05-29 14:14:19		4066767
61	Chebykin D. (GriGrim)	38	62	228	2018-03-26 15:47:45		4158834
62	Shkarednyj I.N. (Gosha)	36	66	151	2018-03-23 22:38:32		4162743
63	Boiko D. (Angellore)	8	233	229	2018-03-23 21:19:51		4162822
64	Azbel' E.G. (enull)	77	15	148	2018-03-08 04:10:21		4185451
65	Shkarednyj I.N. (Gosha)	36	66	147	2018-02-26 08:13:30		4199608
66	F (uff)	65	25	95	2018-01-22 15:57:03		4249545
67	Aliev R. (y4nzi)	27	95	259	2017-12-17 18:48:39		4301213
68	Kordyum A. (alko58)	227	0	101	2017-11-21 18:18:43		4338683
69	Zajtsev V.S. (Sleeping)	22	112	190	2017-11-20 12:57:31		4340444
70	Aliev R. (y4nzi)	27	95	257	2017-11-19 19:09:17		4341513
71	Aliev R. (y4nzi)	27	95	255	2017-10-24 14:34:21		4379227
72	Kukushkin S.A. (smog)	15	153	171	2017-10-05 18:37:27		4406344
73	Skorohod I. (Dracul4ik)	78	15	156	2017-09-12 19:34:33		4439407
74	Grinkevich D.L. (Dmitrij Grinkevich)	23	109	115	2017-07-21 14:09:37		4516052
75	Bezhaev A.Yu. (Baser)	7	236	220	2017-06-19 06:24:54		4562597
76	Vorob'ev E.V. (Johnnymnemonic)	161	0	138	2017-06-16 09:15:49		4566746
77	F (uff)	65	25	185	2017-06-01 10:27:49		4588274
78	Skorohod I. (Dracul4ik)	78	15	146	2017-05-04 17:54:53		4628147
79	Movlyanov A.P. (Oct)	13	193	218	2017-03-22 18:23:50		4690038
80	Skorohod I. (Dracul4ik)	78	15	144	2016-10-10 15:20:14		4924942
81	Sysoev A.V. (Sysa)	49	39	165	2016-09-16 00:07:24		4960414
82	Sysoev A.V. (Sysa)	49	39	168	2016-07-22 23:44:07		5039638
83	Karasyova N.V. (vlksm)	9	225	263	2016-04-23 11:28:43		5169973
84	Titovskij P.S. (kli3ma)	47	45	164	2016-03-25 05:49:30		5212072
85	Sivoglazov M.A. (Gaizenberg)	66	24	127	2015-11-28 14:08:52		5381493
86	Maslyaev V.S. (Velmont)	90	11	170	2015-11-06 14:01:20		5413180
87	Sivoglazov M.A. (Gaizenberg)	66	24	261	2015-10-13 23:22:26		5447179
88	Fomichev A.V. (Fomichev)	197	0	101	2015-10-07 11:21:04		5456541
89	Grinkevich D.L. (Dmitrij Grinkevich)	23	109	188	2015-09-19 12:34:48		5482387
90	Movlyanov A.P. (Oct)	13	193	194	2015-09-09 14:10:52		5496691
91	Frolov (dr.shtopor)	81	14	141	2015-09-08 10:04:55		5498377
92	Varenikov D.M. (Dmitriy Varenikov)	19	128	263	2015-08-31 08:35:37		5509986
93	Chebykin D. (GriGrim)	38	62	263	2015-08-28 21:04:30		5513557
94	Halushka B. (halushka)	46	46	211	2015-08-26 13:33:28		5516888
95	Maslyaev V.S. (Velmont)	90	11	140	2015-07-27 05:27:50		5560574
96	Khromulyak O.M. (ChOleg)	120	5	150	2015-07-26 08:20:51		5561841
97	Chebykin D. (GriGrim)	38	62	216	2015-07-20 09:39:02		5570403
98	Halushka B. (halushka)	46	46	143	2015-07-13 15:28:55		5580133
99	Halushka B. (halushka)	46	46	204	2015-07-07 15:42:03		5588760
100	Skorohod I. (Dracul4ik)	78	15	256	2015-01-28 15:03:11		5819199

Home
Week news

Certification

SQL exercises

HELP

Performance

Profile
References

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