Rating of second-stage exercises (median) on SQL Exercises

March 21, 17:46 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
  • Visual simulation (painting)
  • Exercises voting (SELECT)
  • Exercises voting (DML)

Forums

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

Certification

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

HELP

Query optimization

For employers

Support SQL-EX.RU

Rating of 2nd-stage exercises (median)

Rating of second-stage exercises (average)

No - exercise number; Bonus - level of difficulty;
Solved - number of visitors, who have solved this exercise;
Time(min) - the median time (calculated over all participants) that has been spent for solution in minutes;
noOK - number of visitors, who have not solved this exercise yet.
(Click on a cell to see list of these);
Length - wording length in symbols;
Rank - average score on a result of voting.

No	Bonus	Solved	Time(min)	noOK	Length	Author	Date	Rank
217	4	9	31871	4	549	pegoopik	2015-08-28	9.2 (5)
237	3	2	15761	2	1123	Baser	2022-05-13	10.0 (1)
147	4	28	14593	2	1213	$erges	2010-08-06	9.7 (19)
157	3	24	12925	2	960	anddros	2009-06-05	9.6 (15)
163	3	19	11408	0	1640	Ozzy	2010-01-08	9.6 (14)
143	5	46	11333	14	946	inkerman	2007-10-07	8.8 (30)
214	4	11	10103	0	433	pegoopik	2015-05-30	10.0 (7)
155	3	27	9893	2	761	vlksm	2009-04-17	9.9 (18)
259	4	22	9370	2	276	anddros	2009-08-24	9.5 (13)
216	3	11	8681	1	279	pegoopik	2015-05-15	9.9 (8)
181	4	15	8489	1	1869	Ozzy	2011-10-08	9.7 (10)
194	4	15	7997	1	1461	pegoopik	2012-07-13	10.0 (11)
234	3	5	7476	1	1481	Kursist	2020-02-28	9.7 (3)
253	3	30	7278	7	1097	$erges	2008-05-17	8.9 (20)
257	4	17	6467	1	2758	pegoopik	2012-02-20	9.4 (13)
161	3	22	6370	3	889	Ozzy	2009-11-06	9.3 (18)
224	3	11	6363	0	1979	selber	2017-04-14	9.5 (8)
138	5	146	6228	33	949	Cyrilus	2005-12-09	9.1 (65)
206	4	14	6127	0	1484	Baser	2013-11-23	9.1 (12)
230	2	8	5920	1	728	pegoopik	2018-07-27	9.8 (5)
231	3	6	5903	0	787	mcrain	2018-08-24	10.0 (4)
211	2	14	5791	1	588	Baser	2014-06-30	9.8 (9)
255	4	14	5666	4	793	vlksm	2012-02-14	9.8 (9)
225	2	11	5571	0	737	pegoopik	2017-07-15	9.9 (7)
229	3	7	5468	1	1532	al29	2018-03-23	9.7 (6)
160	3	27	4731	0	961	Ozzy	2009-08-07	9.6 (17)
190	4	17	4683	1	717	vlksm	2012-03-17	8.9 (14)
159	3	17	4480	1	565	anddros	2012-07-22	8.2 (14)
220	3	7	4388	1	1175	pegoopik	2016-12-17	10.0 (4)
191	3	14	4212	0	948	qwrqwr	2012-06-08	9.5 (11)
154	4	26	4200	3	848	anddros	2009-03-18	9.9 (17)
252	2	35	3918	3	308	Ozzy	2009-06-14	8.4 (23)
149	3	35	3891	2	506	$erges	2008-09-08	9.2 (21)
171	3	19	3682	1	1670	Ozzy	2010-12-05	9.3 (15)
218	4	13	3491	2	1500	al29	2016-04-04	9.6 (8)
116	5	247	3479	20	469	$erges	2008-12-13	9.4 (119)
189	4	15	3350	0	1563	Baser	2012-02-05	8.6 (12)
178	3	23	3302	1	1680	Baser	2011-08-13	9.1 (15)
119	5	109	3199	4	703	Velmont	2014-03-07	9.6 (58)
188	3	17	3191	1	733	qwrqwr	2012-02-04	9.8 (12)
151	3	35	3190	4	1096	anddros	2008-12-30	9.0 (20)
172	3	22	3097	0	1719	Ozzy	2011-03-11	9.8 (16)
208	3	14	3063	0	821	pegoopik	2013-12-20	8.8 (12)
167	3	24	3032	0	674	qwrqwr	2011-01-18	9.9 (15)
156	2	51	3004	3	391	anddros	2009-04-17	9.1 (29)
187	3	26	2965	0	978	=Maxim=	2011-12-31	8.8 (21)
232	3	6	2940	0	513	al29	2018-08-20	10.0 (5)
144	4	46	2928	4	950	pvv	2008-01-01	7.3 (29)
100	4	252	2916	10	650	qwrqwr	2010-04-27	9.4 (126)
153	3	37	2779	4	1539	Ozzy	2009-02-14	9.5 (20)
102	4	184	2687	8	933	GriGrim	2011-07-16	9.5 (87)
221	2	17	2539	1	1023	Baser	2016-11-05	8.9 (10)
223	2	13	2357	0	641	Baser	2016-11-12	9.9 (8)
179	3	17	2329	0	844	pegoopik	2011-09-17	9.2 (12)
141	4	80	2225	10	977	vlksm	2006-10-29	9.0 (36)
210	2	15	2132	0	483	_dimon_	2014-02-07	10.0 (11)
101	4	218	2125	16	1096	pegoopik	2010-11-20	9.4 (116)
120	4	106	2008	2	239	pegoopik	2014-02-14	9.0 (52)
145	3	71	2007	1	859	pvv	2008-01-07	8.6 (33)
184	2	25	1953	2	432	Baser	2011-11-26	8.8 (19)
227	3	10	1948	1	2142	mcrain	2017-12-08	7.3 (6)
164	2	37	1943	1	1622	anddros	2010-04-26	9.7 (22)
148	2	67	1924	7	894	vlksm	2008-09-06	9.3 (35)
72	4	1025	1917	149	608	paparome	2005-12-03	9.2 (276)
98	4	585	1900	44	538	ZrenBy	2003-09-01	8.2 (131)
205	2	16	1877	0	529	qwrqwr	2013-11-22	8.9 (10)
193	2	22	1798	0	522	Baser	2012-07-06	8.3 (15)
150	4	37	1780	4	909	@Nikotin	2008-11-09	8.6 (21)
182	3	23	1717	0	1377	Baser	2011-10-29	8.1 (17)
87	4	640	1674	89	459	Roman Golubin	2006-07-14	9.3 (181)
89	3	417	1658	31	870	_Bkmz_	2008-06-21	7.9 (158)
183	2	30	1611	2	518	GriGrim	2011-11-12	9.1 (15)
137	4	191	1607	25	616	Cyrilus	2005-03-06	9.2 (67)
146	3	62	1606	3	949	paparome	2008-01-22	9.7 (34)
200	3	19	1586	0	1129	qwrqwr	2013-10-05	9.3 (13)
222	2	14	1583	1	1475	pegoopik	2016-12-23	9.8 (9)
175	3	30	1548	1	2151	pegoopik	2011-04-28	8.5 (22)
165	2	30	1544	3	1600	vlksm	2010-03-18	9.9 (18)
228	1	19	1540	1	1419	qwrqwr	2018-01-12	10.0 (11)
121	3	408	1527	3	804	ZrenBy	2004-02-26	7.7 (99)
169	3	31	1519	0	1559	Valdaj	2010-09-02	8.5 (22)
196	3	25	1494	0	661	qwrqwr	2013-05-17	9.4 (15)
176	3	31	1484	0	385	qwrqwr	2011-05-20	9.5 (21)
219	2	17	1482	0	486	pegoopik	2016-04-08	9.9 (9)
136	3	114	1480	5	618	Ozzy	2011-05-12	7.5 (50)
132	3	111	1453	4	2500	risp	2010-01-25	7.7 (55)
198	2	23	1444	0	332	Angellore	2013-09-13	9.4 (16)
152	3	47	1420	4	1301	vlksm	2009-01-05	9.7 (27)
180	3	32	1375	0	274	qwrqwr	2011-09-16	9.6 (24)
76	3	459	1373	16	949	silver	2010-01-23	8.8 (182)
199	3	20	1350	0	1448	Baser	2013-08-17	8.4 (14)
213	2	26	1346	0	369	qwrqwr	2014-10-17	9.6 (15)
123	3	248	1343	38	1254	Ozzy	2009-08-22	9.0 (116)
158	3	38	1330	0	1174	Ozzy	2010-04-09	8.9 (23)
215	2	23	1326	0	331	pegoopik	2015-03-06	9.3 (13)
135	3	65	1323	2	854	qwrqwr	2013-04-19	8.9 (34)
212	3	16	1319	0	585	Baser	2014-10-14	8.9 (10)
168	2	43	1310	2	455	qwrqwr	2010-08-27	9.5 (25)
85	3	370	1281	19	1397	Ozzy	2009-10-10	8.5 (143)
69	2	178	1280	7	210	Gosha	2017-12-15	9.1 (61)
82	3	392	1279	12	1780	_Virt_	2010-04-27	8.2 (145)
106	3	284	1271	6	647	vlksm	2008-11-27	8.8 (124)
207	3	17	1255	0	486	pegoopik	2016-01-15	10.0 (9)
68	3	298	1242	25	608	pegoopik	2014-08-01	8.1 (117)
186	1	37	1215	0	1447	Ozzy	2011-12-30	9.2 (24)
77	2	312	1211	33	1053	selber	2015-07-10	8.7 (131)
96	3	416	1198	81	572	anddros	2008-11-22	8.8 (166)
65	3	721	1177	51	671	Ozzy	2010-01-29	7.7 (256)
173	1	52	1172	3	945	Ozzy	2011-01-13	9.3 (28)
84	3	420	1140	16	815	Ozzy	2009-12-26	8.4 (154)
93	3	171	1122	5	492	qwrqwr	2014-03-14	9.3 (72)
57	2	164	1052	16	537	Kursist	2020-10-10	8.3 (49)
134	3	176	1003	4	821	pvv	2008-01-22	8.5 (71)
233	1	16	930	1	2321	pegoopik	2019-03-08	10.0 (9)
37	3	784	888	25	576	qwrqwr	2013-02-22	8.0 (264)
71	3	546	797	23	941	anddros	2009-12-26	8.4 (191)
140	2	82	720	2	578	_Bkmz_	2010-01-30	8.9 (41)
125	3	374	704	3	526	dimzv	2004-02-29	8.7 (93)
185	1	43	688	3	782	=Maxim=	2011-11-25	7.9 (25)
195	3	26	658	0	722	Dmitrij Grinkevich	2013-04-20	9.1 (15)
110	3	434	658	11	942	Snowbear	2006-03-14	8.9 (117)
226	3	10	652	2	2054	pegoopik	2017-10-14	9.3 (6)
126	2	186	601	12	944	$erges	2008-09-07	8.6 (91)
251	4	68	594	3	850	paparome	2006-10-01	8.0 (29)
162	2	59	592	0	1067	Ozzy	2009-12-26	9.3 (34)
58	3	636	578	12	397	qwrqwr	2013-03-01	8.2 (220)
307	2	19	553	0	1095	Baser	2017-06-29	8.5 (11)
174	1	56	535	0	1084	qwrqwr	2011-02-25	9.3 (32)
130	2	120	534	0	700	anddros	2010-05-22	8.9 (59)
202	2	29	504	0	557	qwrqwr	2013-11-01	9.1 (16)
99	3	198	481	8	956	Dmitrij Grinkevich	2012-05-05	8.3 (80)
107	2	407	467	9	688	Fiolent	2004-02-26	8.1 (101)
66	3	676	463	54	392	anddros	2009-12-26	8.5 (254)
64	3	613	434	49	506	qwrqwr	2010-05-13	8.1 (192)
254	1	45	420	1	1383	Baser	2011-09-02	8.8 (27)
127	2	61	406	2	985	GriGrim	2014-12-21	7.9 (27)
177	1	53	390	0	935	pegoopik	2011-07-17	8.5 (26)
142	2	115	379	1	944	paparome	2007-03-24	9.0 (48)
166	1	61	375	1	449	anddros	2010-07-26	9.5 (31)
108	3	282	370	5	521	crescent	2011-03-23	8.9 (114)
80	2	346	364	10	453	qwrqwr	2011-10-21	9.0 (139)
23	3	1576	363	124	307	Palkin	2007-03-29	8.4 (380)
115	2	81	348	1	736	selber	2016-05-28	9.1 (34)
170	2	55	332	1	320	qwrqwr	2010-10-24	9.0 (27)
209	1	33	319	1	735	Baser	2013-12-30	8.0 (15)
92	2	561	310	9	405	paparome	2006-07-26	8.5 (124)
139	2	126	295	2	907	Snowbear	2006-09-09	8.3 (44)
45	2	467	285	15	473	dumkan	2016-04-03	8.0 (128)
36	3	1051	275	23	786	risp	2011-05-06	8.0 (317)
111	2	456	271	3	545	Fiolent	2005-01-19	8.3 (102)
47	3	971	262	14	554	qwrqwr	2010-11-20	8.1 (295)
41	3	1140	261	18	253	qwrqwr	2010-04-26	8.1 (360)
29	2	1101	256	39	799	GiBis	2011-09-17	7.5 (342)
54	2	1359	247	45	796	Ozzy	2008-09-06	8.2 (469)
60	3	2081	246	119	313	Serge I	2005-03-05	7.8 (338)
12	1	444	244	47	348	Serge I	2019-04-12	7.2 (105)
262	2	14	243	0	740	selber	2019-06-21	7.0 (7)
67	2	587	233	17	729	Ozzy	2010-04-27	8.3 (208)
204	1	34	232	1	366	anddros	2013-11-19	8.7 (17)
118	2	429	231	1	206	Fiolent	2004-01-05	8.2 (91)
133	2	92	228	0	1614	pickman	2011-07-01	8.2 (47)
91	2	228	215	1	642	smog	2012-05-26	9.1 (93)
105	2	142	211	0	610	Baser	2013-09-20	8.6 (55)
34	2	1197	211	27	765	qwrqwr	2010-09-24	7.9 (360)
129	2	275	202	7	658	DimaN	2004-03-01	7.5 (59)
122	1	137	197	2	725	Dmitrij Grinkevich	2012-09-14	5.9 (56)
43	2	546	194	4	597	qwrqwr	2015-04-24	8.4 (172)
75	2	404	186	4	644	qwrqwr	2011-07-22	7.5 (148)
40	1	322	184	10	398	Serge I	2018-09-07	7.0 (84)
260	2	52	183	0	999	qwrqwr	2012-02-03	7.7 (35)
238	2	5	180	0	1143	Baser	2022-05-13	8.0 (3)
20	2	1515	179	31	327	VIG	2003-09-01	8.0 (344)
131	2	93	177	1	498	GriGrim	2012-05-25	8.6 (43)
86	2	353	175	0	433	Ozzy	2010-03-05	8.6 (119)
62	2	728	175	10	576	Dmitrij Grinkevich	2012-02-11	8.0 (226)
49	2	1202	170	22	891	anddros	2009-06-05	7.9 (375)
261	1	35	169	1	1495	Fomichev	2013-12-07	7.0 (19)
38	2	1053	166	25	302	ZrenBy	2003-09-01	7.5 (212)
95	1	98	166	2	350	qwrqwr	2017-12-01	9.4 (41)
59	2	933	165	6	203	VIG	2003-12-22	8.3 (204)
61	2	982	164	6	772	risp	2009-12-26	8.5 (322)
124	2	380	160	3	455	DimaN	2004-02-26	8.3 (88)
203	1	40	160	1	932	=Maxim=	2013-10-05	9.4 (23)
304	2	24	151	0	1132	aks_nsk	2016-02-05	9.3 (15)
55	2	581	146	6	339	VIG	2005-06-26	7.7 (114)
74	2	674	143	8	855	vlksm	2008-06-21	8.3 (206)
7	1	238	142	87	513	Baser	2021-02-27	8.0 (57)
16	2	932	136	60	336	qwrqwr	2014-07-18	7.5 (255)
109	2	496	128	1	671	VIG	2003-12-23	8.0 (99)
201	2	38	127	0	749	Baser	2013-09-21	8.7 (23)
39	2	1397	125	24	256	Serge I	2003-08-28	7.5 (282)
83	2	540	120	6	798	lepton	2006-09-29	8.5 (151)
78	2	422	117	5	451	_ORA_	2010-04-27	7.5 (132)
235	2	7	117	0	665	Kursist	2021-07-10	9.5 (4)
81	2	601	116	12	707	$erges	2008-05-10	8.3 (170)
51	1	579	115	15	416	Fiolent	2004-06-23	8.2 (152)
94	2	258	114	0	773	pickman	2011-04-27	8.3 (95)
33	2	1280	109	27	364	DimaN	2004-03-01	7.6 (347)
35	3	600	108	13	695	Baser	2015-09-18	8.7 (173)
197	1	43	107	0	518	pegoopik	2013-06-10	8.8 (19)
236	1	10	106	0	467	Baser	2021-07-24	9.6 (7)
52	1	518	104	3	268	Serge I	2015-01-10	8.6 (148)
104	1	143	104	0	571	pegoopik	2013-07-19	8.4 (60)
128	1	230	104	4	829	inkerman	2007-09-14	8.4 (74)
79	1	972	103	14	403	Serge I	2003-06-05	7.7 (157)
305	1	25	101	0	160	Baser	2017-01-06	9.0 (14)
44	2	758	99	8	273	Serge I	2011-11-25	7.9 (235)
90	1	240	99	1	499	Dmitrij Grinkevich	2012-03-03	7.9 (86)
73	1	464	97	3	367	Ruslan1707	2010-11-02	7.5 (153)
46	2	1215	96	128	340	Serge I	2009-08-12	6.8 (322)
17	2	1672	96	24	122	VIG	2003-04-29	8.2 (322)
6	2	2089	95	102	281	Serge I	2005-05-07	8.0 (368)
70	1	679	95	3	334	Serge I	2009-04-17	7.9 (222)
113	1	137	92	0	497	smog	2013-03-29	8.5 (57)
103	1	143	86	1	850	Baser	2013-10-05	7.4 (58)
114	1	453	83	4	298	Serge I	2003-12-24	8.4 (96)
256	1	39	82	1	436	anddros	2013-11-08	8.9 (20)
24	2	1643	79	6	685	Aaz	2004-02-26	7.0 (459)
26	1	1503	78	25	289	VIG	2003-12-22	7.7 (357)
25	2	1253	75	29	232	DimaN	2004-06-22	7.1 (325)
9	2	1438	72	31	498	vasia armor	2010-05-21	8.0 (416)
10	1	768	72	50	179	Serge I	2017-01-20	8.0 (213)
28	1	1235	68	10	283	ZrenBy	2003-09-01	7.6 (235)
8	2	1529	66	93	600	Serge I	2008-06-21	7.6 (377)
21	1	1228	62	9	709	paparome	2006-03-14	8.1 (278)
97	1	371	62	3	231	dimzv	2004-03-01	7.7 (81)
112	1	43	62	2	393	Gosha	2020-06-03	9.0 (21)
32	1	1386	57	7	603	Roman Golubin	2005-12-13	7.5 (315)
50	1	552	57	18	421	mslava	2003-12-23	7.2 (105)
42	1	1636	55	14	249	Serge I	2003-06-05	7.7 (322)
18	1	1652	55	10	157	ZrenBy	2003-09-01	7.7 (359)
117	1	431	54	0	193	Fiolent	2003-12-26	7.6 (86)
192	2	48	52	0	709	Baser	2012-03-03	9.2 (25)
27	1	1300	51	8	376	Fiolent	2004-02-26	7.3 (298)
48	1	1177	51	6	252	Serge I	2009-06-22	7.4 (309)
30	1	1774	50	3	205	Serge I	2003-08-28	7.9 (390)
19	1	2016	47	23	269	Serge I	2004-06-23	7.5 (413)
22	1	1642	47	12	270	ZrenBy	2003-09-01	7.3 (377)
14	1	2477	47	37	116	Serge I	2003-04-08	7.5 (433)
56	1	1070	47	3	565	Fiolent	2004-06-22	8.0 (279)
63	1	1351	46	5	190	VIG	2003-06-05	7.6 (242)
302	0	37	45	0	510	pegoopik	2012-07-27	7.6 (11)
31	1	1068	44	6	349	Fiolent	2004-06-22	7.9 (260)
13	1	1759	40	22	194	ZrenBy	2003-09-01	7.5 (407)
306	1	9	39	0	363	Baser	2022-04-29	7.4 (5)
53	1	1483	38	25	234	DimaN	2004-03-01	7.6 (383)
15	1	1239	35	8	287	Dmitrij Grinkevich	2012-04-21	7.6 (326)
11	1	1939	34	16	130	ZrenBy	2003-09-01	7.5 (436)
88	2	33	32	1	293	Serge I	2021-10-15	9.1 (13)
258	3	25	13	0	1070	Baser	2014-09-19	7.6 (10)
301	0	43	8	0	55	pegoopik	2012-03-23	8.9 (20)

Home
Week news

Certification

SQL exercises

Forums

Ratings

HELP

Performance

Profile
References