SQL exercises

June 15, 13:57 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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Top 100 results achieved on 10 latest exercises

(41DML, 42DML, 43DML, 44DML, 12, 57, 112, 234, 235, 262)

No	person	exs	score	minutes	last_ex
1	Chernov D.V. (Kursist)¹	10/10(3)	18	1304	sel 235 (2021-02-27)
2	Koptel'tsev V. (selber)³¹	10/10(2)	18	1736	sel 235 (2021-02-27)
3	Kreslavskij O.M. (Arcan)⁵	9/10(0)	15	131	sel 235 (2021-02-27)
4	Sigankov V.I. (vasilyvanc)³⁰	9/10(0)	15	815	sel 235 (2021-02-27)
5	Karasyova N.V. (vlksm)⁹	9/10(0)	15	1918	dml 44 (2021-05-05)
6	Varenikov D.M. (Dmitriy Varenikov)¹⁹	9/10(0)	15	16989	sel 235 (2021-03-24)
7	Filippkin D.V. (_dimon_)¹¹	8/10(0)	14	368	dml 44 (2021-02-17)
8	Doschenko V.N. (mcrain)³	6/10(0)	14	4807	dml 43 (2020-06-24)
9	Kurochkin P.A. (qwrqwr)¹⁰	8/10(0)	13	98434	sel 235 (2021-03-11)
10	Gireiko E. (Zubryonok)¹⁴¹	7/10(0)	12	53	dml 44 (2021-04-19)
11	Litvinov V.V. (NewsMan)¹⁴²	7/10(0)	12	981	dml 44 (2021-04-04)
12	Komarov A.N. (Shveda Saulya)⁷⁰	7/10(0)	12	2054	dml 44 (2021-01-29)
13	Milenkov (wqer)⁹⁶	7/10(0)	12	2116	dml 44 (2021-03-08)
14	Matveeva D.D. (darya_matveeva)¹⁴⁰	7/10(0)	12	2528	dml 44 (2021-04-08)
15	Dubinskij A.V. (_velial)⁸	7/10(0)	12	2907	sel 57 (2021-02-23)
16	Konotopov S. (kinkou)¹⁴³	7/10(0)	12	5251	sel 112 (2021-02-15)
17	Shkarednyj I.N. (Gosha)³⁵	7/10(1)	12	64655	dml 44 (2021-01-25)
18	Petrov Y. (YuriPetrov)³⁴	7/10(0)	12	144458	sel 112 (2021-05-26)
19	Slepnev S.V. (SergSlep)¹⁷¹	6/10(0)	11	5343	dml 44 (2021-01-26)
20	Krasovskij E.A. (pegoopik)⁴	4/10(0)	10	3609	dml 42 (2019-12-09)
21	Kostomarov A.V. (al29)²	6/10(0)	9	46414	sel 234 (2021-04-17)
22	Yakovlev M.V. (MikhailYakovlev535)¹³⁰	4/10(0)	9	1644	dml 43 (2020-07-08)
23	Samarin A. (not.yet.sql.master)¹²⁹	3/10(0)	8	646	dml 42 (2020-05-09)
24	Vasilevskaya E.A. (kattiks)¹³⁷	3/10(0)	5	7280	sel 57 (2021-04-18)
25	Timofeeva E.V. (Umrikhina)²⁴	2/10(0)	4	790	dml 41 (2019-11-27)
26	Buldenkov D.A. (eXeQuThor)¹³²	2/10(0)	4	996	dml 41 (2019-10-28)
27	Fokin A. (Vizitor )⁴¹	2/10(0)	4	2436	dml 41 (2019-08-16)
28	Dmitriev A. (Havr)¹⁵⁰	2/10(0)	4	2481	dml 41 (2019-07-30)
29	Williams B. (BW)³⁶	2/10(0)	4	170734	dml 41 (2020-02-20)
30	Chebykin D.N. (GriGrim)³⁷	3/10(0)	3	42	sel 112 (2020-12-19)
31	Zajtsev V.S. (Sleeping)²³	3/10(0)	3	86	sel 12 (2020-11-04)
32	Akol'zin M.S. (maksimok2991)¹⁹⁵	3/10(0)	3	483	sel 112 (2021-03-14)
33	Nikolaj (Bulocka_c_izumom)¹⁷⁵	3/10(0)	3	586	sel 112 (2020-12-27)
34	Novikov (PNA921)¹⁹³	3/10(0)	3	1551	sel 57 (2021-01-15)
35	Komov K.N. (zigmund1)²¹⁰	3/10(0)	3	7277	sel 112 (2021-03-21)
36	Yartsev Yu. (Yury66)²⁰¹	3/10(0)	3	55205	sel 57 (2021-04-02)
37	Fedevych V.I. (labuch_fedev)³³	2/10(0)	3	233	sel 262 (2020-03-19)
38	Tarshin S.N. (tsn)¹⁶⁰	2/10(0)	2	46	sel 112 (2020-07-30)
39	Aronov O. (aronov.oleg)¹³⁸	2/10(0)	2	48	sel 57 (2020-12-09)
40	Mitroshin D.G. (d_mit)⁴³⁸	2/10(0)	2	68	sel 57 (2021-05-26)
41	Sergeev (post_prog)⁵³⁰	2/10(0)	2	84	sel 57 (2021-01-01)
42	Zhdanov K.V. (scuder)⁴⁷¹	2/10(0)	2	85	sel 57 (2021-04-03)
43	Gajchuk A.S. (asgaychuk)³⁶³	2/10(0)	2	85	sel 57 (2021-05-21)
44	Zelentsov I.A. (Overcomzi)⁷⁴⁸	2/10(0)	2	129	sel 57 (2021-02-10)
45	Prokof'eva I.V. (IrinaP)⁷⁴⁷	2/10(0)	2	208	sel 57 (2021-01-12)
46	Vestnikov D.A. (letsstudybegin)²⁷³	2/10(0)	2	236	sel 57 (2021-01-17)
47	Petrov D.B. (GiBis)²⁷⁴	2/10(0)	2	264	sel 57 (2020-12-04)
48	Markov (yaroslavv)⁷⁴⁹	2/10(0)	2	299	sel 57 (2020-12-14)
49	Krasavin A.A. (alexey.krasavin)⁶³⁰	2/10(0)	2	367	sel 57 (2021-02-17)
50	Markin N. (Qmaro)⁵⁸²	2/10(0)	2	504	sel 57 (2021-02-08)
51	Kuydinov D. (sh4rk717)⁶⁴¹	2/10(0)	2	629	sel 57 (2021-03-21)
52	Krylosov A.Yu. (Alexey Kry)⁷⁵⁵	2/10(0)	2	644	sel 57 (2021-05-28)
53	Vasil'ev A.A. (TruthFinder)⁴⁵³	2/10(0)	2	653	sel 57 (2020-12-08)
54	Kasumov M.M. (MaratKasumov)⁴⁷⁵	2/10(0)	2	812	sel 57 (2021-01-04)
55	Svitochev I.O. (Svitochev)³³⁹	2/10(0)	2	815	sel 57 (2020-12-08)
56	Lyaschenko S.N. (pimen78)⁵¹⁸	2/10(0)	2	817	sel 57 (2021-04-13)
57	Drozdov A.S. (ELVISNEVERDIES1)⁶³⁴	2/10(0)	2	832	sel 57 (2020-12-21)
58	Kostyushko Yu.V. (kostushko)³⁵⁰	2/10(0)	2	842	sel 57 (2021-04-27)
59	Tatsyuk O.A. (archi_98)⁶²⁰	2/10(0)	2	850	sel 57 (2021-02-18)
60	Popov S.V. (PopovSV)⁷⁴⁶	2/10(0)	2	864	sel 57 (2021-04-16)
61	Gubarev L.I. (Livan)⁴²⁸	2/10(0)	2	878	sel 57 (2021-02-15)
62	gls G.G. (gls52)⁴⁰⁴	2/10(0)	2	913	sel 57 (2020-12-11)
63	Marchenkov (Decoe)⁷⁰⁷	2/10(0)	2	1184	sel 57 (2021-03-22)
64	Cherpak V.E. (OakTree)⁵⁹³	2/10(0)	2	1268	sel 57 (2020-11-19)
65	Trofimov (learn_jack)³³⁰	2/10(0)	2	1316	sel 57 (2020-11-17)
66	Ikramov R. (ARNET)⁵³⁹	2/10(0)	2	1409	sel 57 (2021-01-09)
67	Yanin M.Yu. (Mikhkha)⁷²⁴	2/10(0)	2	1451	sel 57 (2021-04-05)
68	SmirnOFF (select0r)⁷⁶⁴	2/10(0)	2	1776	sel 57 (2021-04-01)
69	Rodionov S. (oldos)³²⁹	2/10(0)	2	1998	sel 57 (2021-02-27)
70	Ladanov N.V. (XAKEP_BBC)⁷⁶²	2/10(0)	2	2009	sel 57 (2020-11-28)
71	Lazareva E. (lea_22)³⁵²	2/10(0)	2	2087	sel 57 (2020-11-19)
72	Rzazade N.M. (Natiq849)⁴⁷⁶	2/10(0)	2	2149	sel 57 (2021-06-01)
73	bitsadze K.R. (furie)²⁴³	2/10(0)	2	2397	sel 57 (2021-06-07)
74	Mikhailov S. (curiouser)³²⁵	2/10(0)	2	3049	sel 57 (2020-11-18)
75	Yarovaya Yu.V. (YuliyaYar)⁷⁶⁵	2/10(0)	2	3081	sel 57 (2021-05-26)
76	ol O. (svinokiller)⁴³⁰	2/10(0)	2	3149	sel 57 (2021-05-06)
77	Pravdyuk R.M. (Pro100geniy)⁷⁵³	2/10(0)	2	3150	sel 57 (2020-11-15)
78	Sajfullina E.F. (elena-fairy)⁶⁸¹	2/10(0)	2	3292	sel 57 (2021-05-28)
79	Menyajlo S.S. (Kagerorus)⁷⁶⁶	2/10(0)	2	3588	sel 57 (2021-01-30)
80	Smol'nikova M.A. (fora)⁵³³	2/10(0)	2	4060	sel 57 (2020-12-01)
81	Vlasov (HandKot_)¹⁷⁴	2/10(0)	2	4664	sel 57 (2021-02-19)
82	Kokunina M.V. (Liss-miss)⁷⁵²	2/10(0)	2	5013	sel 57 (2021-04-12)
83	Veselov A.N. (almw)⁵⁰³	2/10(0)	2	5148	sel 57 (2021-01-21)
84	Novozhilov A. (BertokMo)⁶⁷²	2/10(0)	2	5326	sel 57 (2021-03-16)
85	Khomutova (anzhela6660)¹⁰⁷⁸	2/10(0)	2	5455	sel 57 (2021-06-11)
86	Russkikh A. (mandarinchik)³⁹¹	2/10(0)	2	5614	sel 57 (2021-03-12)
87	Koletvinova A. (Poganka)³²⁰	2/10(0)	2	9601	sel 57 (2021-03-14)
88	Savin A.Yu. (mirovingin)²⁵⁸	2/10(0)	2	12155	sel 57 (2021-04-02)
89	Antunez Garcia F. (antunez)⁷⁹⁹	2/10(0)	2	27267	sel 57 (2021-02-18)
90	Shustov V.V. (shustovvlad)⁶⁵⁵	2/10(0)	2	61234	sel 57 (2020-11-30)
91	Zhdamorev (zda)²¹⁴	2/10(0)	2	165371	sel 57 (2021-01-29)
92	Bezhaev A.Yu. (Baser)⁷	1/10(1)	1		sel 235 (2021-02-27)
93	Abramov M.V. (AbramovMaksim2021)²⁹³⁰	1/10(0)	1	4	sel 12 (2021-04-07)
94	Verdiyev A. (Nuklinoid)⁶⁸⁹	1/10(0)	1	5	sel 12 (2019-07-05)
95	Maksimov A.A. (AntonMaksimov77778888)⁴⁹⁶⁷	1/10(0)	1	6	sel 12 (2020-07-09)
96	Belyaev (andruwa)¹⁰³⁰	1/10(0)	1	8	sel 12 (2020-05-12)
97	alex (alex882)⁴¹¹	1/10(0)	1	8	sel 12 (2019-07-26)
98	Petropavlov (sqlstuding)²⁵⁷⁴	1/10(0)	1	9	sel 12 (2020-03-22)
99	Boiko D. (Angellore)⁶	1/10(0)	1	9	sel 12 (2019-05-23)
100	Kuz'mitskij Ya.O. (YaroslavYaroslav)¹⁰⁶⁹	1/10(0)	1	10	sel 12 (2020-06-19)

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