Today's statistics at "SQL Exercises"

August 31, 22:54 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.

Ratings

  • 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

Statistics

  • 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)

Forums

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

Certification

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

HELP

Query optimization

For employers

Support SQL-EX.RU

Today statistics

nLog - number of logins;
nSelEx - number of select exercises solved today;
lastEx - number of last select exercise solved;
nDmlEx - number of dml exercises solved today;
Scores - sum of points on the exercises solved today (select and dml);
numLrnEx, LrnScores - number of exercises solved today and sum of points on learning stage

No	Surname	nLog	nSelEx	lastEx	nDmlEx	Scores	numLrnEx	LrnScores
1	Vinogradova S.M. (Tigra1)	2	1	137		4
2	Skokov B.S. (leks$$)	1	1	45		2
3	Sedun A.A. (antoshaSQL)	2					15	26
4	Podlipovskaya N.I. (lipkkkka)	3					15	25
5	Vysochanskij D.V. (ddrproxy)	1					15	25
6	Mal'tsev V.O. (monsterlolit)	3					15	22
7	Rushanyan A. (sasik1984)	1					15	20
8	Il'in S. (Maito_Gai)	1					14	20
9	sar G. (konick_gs)	3					11	19
10	Yurygin A.A. (AntonYurygin)	1					15	18
11	Smirnov I.K. (karpkarpov)	1					ban	ban
12	Bektashev I.V. (ilven10)	1					15	18
13	Lashkevich E. (wenywenywo)	1					15	18
14	Zhur V. (mrvaroz)	2					10	16
15	Denisov (Kot_-_)	1					8	15
16	Gopanenko (Zapruda)	1					11	14
17	Usanova D.A. (Usanova Dar'ya)	1					8	13
18	Ivanova O.N. (olga_ivanova)	2					6	13
19	Shagalov O.L. (TTC)	1					7	12
20	Ivanov D.I. (dimonivanov)	1					10	11
21	DMRITsD (TheCupOfMagic)	2					8	11
22	Kuz'menko (ma0kuz)	1					8	11
23	Sklyarov A.M. (DataRadist)	2					7	11
24	khaytkulov (Kronom)	1					7	11
25	Shuginin Yu. (der_Spielmacher)	1					6	11
26	Koloskov (Art_Dart)	1					ban	ban
27	Detrienko D.S. (Dmitrij Detrienko)	2					7	9
28	Zhandarov A. (Leshka_1322)	2					5	9
29	Borodin A. (Rignar)	1					5	9
30	Noskov P.I. (P_noskov)	3					5	8
31	Folomkin I.N. (onevay)	2					5	8
32	Martynov (daeso)	1					5	8
33	Shishova P.S. (shajealess)	1					5	8
34	Koala2 (Koala2)	2					4	8
35	B (silver10lucky)	1					7	7
36	Ivanov (1c_enjoyer)	2					6	7
37	Koneva T. (taniakkoneva)	1					6	7
38	Shakaryan B. (bogdanshakaryan)	2					5	7
39	grigor'eva V.D. (pivovar123)	1					5	7
40	Astrelina D. (smiling_corgi)	2					4	7
41	Ivanova (evkaa1234)	2					5	6
42	Tikhomirova K.A. (tihomirova.k2)	1					ban	ban
43	Petsgol'dt P.K. (Pavel1PK)	1					4	6
44	Kitaev K.I. (Kostas1234)	1					ban	ban
45	Piotka V. (Pilotich)	1					ban	ban
46	Timchuk I. (Ilya Timchuk)	1					4	5
47	Star E. (raskodirovan)	1					4	5
48	Novikov P. (btte21)	2					3	5
49	Petrov (shader1)	1					4	4
50	Yamshikov V. (Qgol)	1					4	4
51	Dev A. (bluefish4you)	1					3	4
52	Cherniy S.C. (mabakarov)	1					3	4
53	Kornienko (Ivan Kornienko)	2					2	4
54	kofuku (Kofuku)	2					2	4
55	Urakina K. (Ksu774)	1					2	4
56	Isakov (Isak)	1					2	4
57	Saukin U. (novichok_PA)	1					2	4
58	Zub (Rosavor.)	3					3	3
59	Bezhalova A.A. (chopp)	2					3	3
60	Derevenskov R. (Roma_D)	2					3	3
61	Laptev M.S. (Mahmed_tea)	3					ban	ban
62	Shapiro D. (xx_Da_Sha_xx)	3					2	3
63	Korolev R.V. (zouker)	2					2	3
64	user (roitiuser4)	2					ban	ban
65	Romanov (PirateCat)	1					2	3
66	Lyakh (LinaL_)	1					2	3
67	Solomnikova (AlexSolom)	1					2	3
68	Popkova N.A. (adoctor)	2					2	2
69	temirgalieva D. (Dilarochka)	2					2	2
70	Dubina (BITW120496)	1					2	2
71	Yes A.N. (Specialist71)	1					2	2
72	Kurakin (billir)	1					2	2
73	petrov (j0ke!)	1					2	2
74	Morozova (minnat)	1					2	2
75	Berseneva T.M. (Bersa_3785)	3					1	2
76	Shaikh (Angy33)	2					1	2
77	Romanchuk I.A. (ial.romanchuk)	2					1	2
78	a A.A. (rdctfvygbuhjnk)	2					1	2
79	Murat I. (Inzhu_murat13)	2					1	2
80	Karavaev A.S. (karavaev_as)	1					1	2
81	Beketov (becat)	1					1	2
82	Kameneva (kristachak)	1					1	2
83	Kokorin (Eteroton)	1					1	2
84	Komissarov E. (Lalafa1)	1					1	2
85	familievna (tatianka111)	1					1	2
86	Mathematicienne (Mathematicien)	1					1	2
87	Terekhov A. (terekhovart)	1					1	2
88	Mustafin (justaqvxnt)	1					1	2
89	Markovtseva (Mika2aj)	1					1	2
90	Ya (eliz13_13)	1					1	2
91	Leont'evskij D.Yu. (Denis__20)	1					1	2
92	AVAVY A.A. (LUNDUK)	1					1	2
93	Makarova A. (JuStudent)	2					ban	ban
94	Erofeeva K.S. (Kristyona)	2					1	1
95	Matveeva V.S. (AKIVA95)	2					1	1
96	Leschenko (Verochka_21)	1					1	1
97	Kelekhsaev A. (varied_kratos07)	1					1	1
98	Guschin I. (IgorZadachkin)	1					1	1
99	Zozulya P.A. (Polechkaaa)	1					1	1
100	Khom N.M. (Nikk77)	1					1	1
101	Chemrov (Ponch1k)	1					1	1
102	Demidov M. (ceramicboy)	1					1	1
103	Slesarenko S. (SleSergey)	1					1	1
104	cheranev (Arseny2740)	1					1	1
105	Murat M. (murat_mukhammed)	4
106	Shtumpf A. (shtumpf)	3					ban	ban
107	Shibaev (saah)	2
108	Krasovskij E.A. (pegoopik)	2
109	Filatov D.D. (Anticoder)	2
110	Komarov A.N. (Shveda Saulya)	2
111	Sopot N. (pnadzeya)	2
112	Ivanov (UB_Oleg17)	2
113	Pavlov M.A. (firestormer)	2
114	Frantskevich A.Yu. (Megoosa)	2
115	Zheludkov S. (zhsvyach)	2
116	Skibin V.V. (SQL_vvs)	2
117	Kolesnikova (Monika26)	2
118	Gilyazov V.M. (gvmeow)	2
119	Izotova (ksu11111111112)	2
120	Lundukova D.N. (Javohira)	2
121	Khanykova A.O. (nastya356532)	2
122	Kremen' Yu.A. (Test007)	1
123	Kurochkin P.A. (qwrqwr)	1
124	keieiuty (keieiuty)	1
125	Vasiljev D.-. (ToFu)	1
126	Koptel'tsev V. (selber)	1
127	Ushakov D. (Gromozeka)	1					ban	ban
128	Rozhkova V.V. (vita_aprel)	1
129	Smirnitskiy (alexsmr)	1
130	Sergeev V. (32b)	1
131	Malykhin M. (MasterOfMind)	1					ban	ban
132	Tivkov V.S. (_vasil)	1
133	Evseev D. (xOnelinx)	1
134	Zhigarev M. (Smile13)	1
135	Buta S.N. (SergeyButa)	1
136	Revin A.V. (Randry)	1
137	Trubina (Dishaa)	1
138	Piranevskiy A.A. (Piranevskiy)	1
139	Dzarasov D. (dzarah88)	1
140	Ti (Ost2020)	1
141	Taras D.S. (Parit)	1
142	Nikolov (petarnikolov)	1
143	Kharchenko V.V. (vladosio)	1
144	Kotik M. (Lapa123)	1
145	qwe R.Y. (TheWrongOne992)	1					ban	ban
146		1
147	Yefanova M.Y. (mari_5)	1
148	Salikov I.S. (neols2006000)	1
149	Sharapatov N.S. (qum11ch)	1
150	Rumyantseva L. (ahren_enigme)	1
151	Terekhov I.E. (foxboy)	1
152	Nuradinov U. (urasan)	1
153	Berezin (frankmiller)	1
154	Bagautdinov I. (iskbaga)	1
155	Bojko S.K. (boikosk)	1
156	Ivanov (fizzik)	1
157	Rodin (Hi_Mark)	1					ban	ban
158	Sarkis'yan G. (gennadi_s)	1
159	Dekhtyarenko S. (Dekhtyarenko)	1
160	Selezneva (al1aska)	1
161	Bykov (sky-shore)	1
162	Tereschenko (mtifas)	1
163	Zasorina A.B. (Zasorina221115)	1
164	Klyueva A.A. (Klu_eva)	1
165	Rodin (uoloki)	1
166	NIkolay (Nikilay)	1
167	petrov (petrov991)	1
168	Nasyrova (Alewa86)	1
169	Ivanov F.K. (fedor2004)	1					ban	ban
170	Konogorskij L.E. (konogorsky Leo)	1
171	Musin A.R. (Azat3007)	1
172	Kokoulina E.A. (janekoko)	1					ban	ban
173	Mozgovoj R.A. (Roman17)	1					ban	ban
174	Khokhlov (TermiDD81)	1
175	Korolyov V.V. (CHOTKIY)	1
176	Gruganova (Yana999test)	1
177	Samotokhina E.S. (JaneGame)	1
178	R. (Wra1th)	1
179	Simonova M.A. (mean_mistreater)	1
180	Terskaya M.G. (Marina Terskaya)	1					ban	ban
181	Mironova (YuliMir)	1
182	son D.S. (v golove - NULL)	1
183	Kupaev A.V. (Weme)	1					ban	ban
184	Lysykh V.K. (Usilitel')	1
185	Kislyakov D.V. (EggDestroyer)	1
186	Zhiryakov V.V. (vladvladzero)	1
187	Akameeva S.V. (SVA1)	1
188	Raskatov (Alure)	1
189	Velichenkov D.A. (Galotane)	1					ban	ban
190	Abramov V. (Ichigo Kurosaki)	1
191	Igor F. (Vudmam)	1
192	Markevich (pol^2y)	1
193	Sukhorukov M. (miqha)	1
194	Karpov E.S. (karpoves)	1					ban	ban
195	Bulakhtin A.D. (R3Z1D3NT)	1
196	Aleksandrov D.M. (jonkf)	1
197	Khaziev (jiesoryb)	1					ban	ban
198	Bogatyrev N.V. (BNV2873)	1					ban	ban
199	Romanov E. (oxotaenjoyer228)	1
200	Pautov D.Yu. (oracle boy)	1
201	Kyroto1 A. (Kyroto)	1
202	Mozhajskaya G.A. (Vtb60462)	1
203	Korolev A.A. (Ereticheskij Chajnik)	1
204	Ischenko K.Yu. (Kpuh)	1
205	Pushkarev S. (PSV_n)	1
206	dYaTLOV G.D. (GoshaBillis56)	1
207	vagaev I.A. (l1998)	1
208	Kupriyanova P.A. (@poluchku)	1
209	Kazantsev V.D. (kentiko_0)	1					ban	ban
210	Kuzin D.S. (deffer777)	1
211	Chudikov A. (a.chudikov)	1
212	Burtonov A.V. (tak to)	1					ban	ban
213	Efremkin (Innokentij 25-j)	1
214	Kovalyov O.A. (OK_wwz)	1
215	edmond2 (edmond2)	1
216	Bratsykhina T.A. (tatavia25)	1
217	Permyakova (dariamjstc888)	1
218	Bannov A. (LEKSbI)	1
219	Ageeva (Ush1m1ya)	1
220	Petrov M. (Kozyapkin)	1
221	Chvanova E.S. (Brennivin)	1
222	Kropachev E.E. (JackZzzon)	1
223	Nesterov D.A. (saha909)	1
224	Laktionova N.V. (laktionovan)	1
225	Sokolkov M.A. (mxzchm)	1
226	Raviks V. (VladisRav)	1
227	Fedorov (F0ll)	1
228	Shtol'ts (Shtolts)	1
229	Stumpf (artemstorm1)	1					ban	ban
230	Ivanov I. (wiii1)	1
231	Umpi A. (zmumpi)	1
232	Kryuchkov A.V. (Snape99)	1
233	Lopata (Mr.Simon)	1
234	Petrov E.A. (pekum)	1
235	Shapovalov A.S. (shapka_011)	1
236	Azachemwam (Stas2)	1
237	Merkulov (SAM_1991)	1
238	Paraschiv C. (Kazimiruuu)	1
239	Malykhin (Lex1488)	1
240	Yurov N. (bennja2008)	1
241	Zajtsev V. (ZaJaK)	1
242	Sharipova (RimRim93)	1
243	Repin I.A. (tirelessR)	1
244	Makarenko S. (Luck_Llipa)	1
245	sukumar (gans2190)	1
246	Mironov (xLimex)	1
247	Yakor' E. (Zheka_Yakor)	1
248	Sevost'yanova (iahtareeva_45678)	1
249	Pilinoga (mraxba)	1
250	Shcheredin R. (Shereman)	1
251	Zharov D.I. (proJarik)	1
252	Efremov (Politolog)	1
253	Rya V. (VaryaRya)	1
254	akatova (akatov)	1
255	Unregistered	48

Home
Week news

Certification

SQL exercises

Forums

Ratings

HELP

Performance

Profile
References