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

June 09, 08:44 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
237	3	3	463867	1	1123	Baser	2022-05-13	9.5 (2)
217	4	9	31871	4	549	pegoopik	2015-08-28	9.2 (5)
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	3	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	253	2919	10	650	qwrqwr	2010-04-27	9.4 (127)
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	17	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	26	1953	1	432	Baser	2011-11-26	8.9 (20)
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)
98	4	587	1900	44	538	ZrenBy	2003-09-01	8.2 (133)
72	4	1026	1879	149	608	paparome	2005-12-03	9.2 (278)
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	5	909	@Nikotin	2008-11-09	8.6 (21)
182	3	23	1717	0	1377	Baser	2011-10-29	8.1 (17)
87	4	642	1663	89	459	Roman Golubin	2006-07-14	9.3 (182)
89	3	419	1658	31	870	_Bkmz_	2008-06-21	7.9 (159)
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	4	804	ZrenBy	2004-02-26	7.7 (99)
169	3	32	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	1	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	460	1373	16	949	silver	2010-01-23	8.8 (183)
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)
85	3	372	1324	19	1397	Ozzy	2009-10-10	8.5 (144)
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)
82	3	394	1288	11	1780	_Virt_	2010-04-27	8.2 (146)
69	2	180	1280	7	210	Gosha	2017-12-15	9.1 (63)
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	300	1246	26	608	pegoopik	2014-08-01	8.2 (119)
186	1	37	1215	0	1447	Ozzy	2011-12-30	9.2 (24)
77	2	313	1211	33	1053	selber	2015-07-10	8.7 (131)
96	3	418	1187	81	572	anddros	2008-11-22	8.8 (167)
65	3	726	1178	51	671	Ozzy	2010-01-29	7.7 (257)
173	1	52	1172	3	945	Ozzy	2011-01-13	9.3 (28)
84	3	422	1147	16	815	Ozzy	2009-12-26	8.4 (155)
93	3	173	1134	5	492	qwrqwr	2014-03-14	9.3 (73)
57	2	169	1052	16	537	Kursist	2020-10-10	8.3 (52)
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	789	873	25	576	qwrqwr	2013-02-22	8.0 (267)
71	3	549	797	23	941	anddros	2009-12-26	8.4 (193)
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	44	688	3	782	=Maxim=	2011-11-25	7.9 (26)
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	640	578	13	397	qwrqwr	2013-03-01	8.2 (223)
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)
66	3	680	504	54	392	anddros	2009-12-26	8.5 (254)
202	2	29	504	0	557	qwrqwr	2013-11-01	9.1 (16)
99	3	200	481	8	956	Dmitrij Grinkevich	2012-05-05	8.3 (82)
107	2	407	467	9	688	Fiolent	2004-02-26	8.1 (101)
64	3	618	431	49	506	qwrqwr	2010-05-13	8.1 (195)
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	347	364	10	453	qwrqwr	2011-10-21	9.0 (139)
23	3	1580	356	126	307	Palkin	2007-03-29	8.4 (383)
115	2	82	348	1	736	selber	2016-05-28	9.1 (35)
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	563	310	9	405	paparome	2006-07-26	8.6 (125)
139	2	126	295	2	907	Snowbear	2006-09-09	8.3 (44)
45	2	471	285	15	473	dumkan	2016-04-03	8.0 (131)
36	3	1056	275	22	786	risp	2011-05-06	8.0 (320)
111	2	456	271	3	545	Fiolent	2005-01-19	8.3 (102)
41	3	1144	261	18	253	qwrqwr	2010-04-26	8.1 (362)
47	3	976	261	14	554	qwrqwr	2010-11-20	8.1 (299)
29	2	1104	254	40	799	GiBis	2011-09-17	7.5 (345)
54	2	1365	247	44	796	Ozzy	2008-09-06	8.2 (473)
262	2	14	243	0	740	selber	2019-06-21	7.0 (7)
60	3	2084	242	119	313	Serge I	2005-03-05	7.8 (341)
67	2	591	238	17	729	Ozzy	2010-04-27	8.3 (209)
204	1	34	232	1	366	anddros	2013-11-19	8.7 (17)
12	1	453	231	47	348	Serge I	2019-04-12	7.2 (110)
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	230	215	1	642	smog	2012-05-26	9.1 (94)
105	2	142	211	0	610	Baser	2013-09-20	8.6 (55)
34	2	1200	208	27	765	qwrqwr	2010-09-24	7.9 (363)
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	550	192	4	597	qwrqwr	2015-04-24	8.4 (175)
75	2	406	188	4	644	qwrqwr	2011-07-22	7.5 (148)
260	2	52	183	0	999	qwrqwr	2012-02-03	7.7 (35)
40	1	326	181	10	398	Serge I	2018-09-07	7.0 (87)
238	2	5	180	0	1143	Baser	2022-05-13	8.0 (3)
20	2	1524	179	32	327	VIG	2003-09-01	8.0 (348)
62	2	733	178	10	576	Dmitrij Grinkevich	2012-02-11	8.0 (231)
131	2	93	177	1	498	GriGrim	2012-05-25	8.6 (43)
86	2	355	175	0	433	Ozzy	2010-03-05	8.7 (120)
95	1	100	170	3	350	qwrqwr	2017-12-01	9.4 (42)
49	2	1206	170	22	891	anddros	2009-06-05	7.9 (379)
261	1	35	169	1	1495	Fomichev	2013-12-07	7.0 (19)
59	2	937	166	6	203	VIG	2003-12-22	8.3 (207)
38	2	1057	166	26	302	ZrenBy	2003-09-01	7.5 (215)
61	2	987	165	5	772	risp	2009-12-26	8.5 (326)
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)
74	2	676	143	8	855	vlksm	2008-06-21	8.3 (207)
7	1	254	143	99	513	Baser	2021-02-27	8.0 (62)
55	2	587	140	6	339	VIG	2005-06-26	7.7 (118)
16	2	943	136	61	336	qwrqwr	2014-07-18	7.5 (260)
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	1401	125	24	256	Serge I	2003-08-28	7.5 (285)
83	2	542	120	5	798	lepton	2006-09-29	8.5 (152)
78	2	423	119	5	451	_ORA_	2010-04-27	7.5 (132)
235	2	7	117	0	665	Kursist	2021-07-10	9.5 (4)
81	2	602	116	12	707	$erges	2008-05-10	8.3 (170)
51	1	584	115	15	416	Fiolent	2004-06-23	8.3 (156)
94	2	261	114	0	773	pickman	2011-04-27	8.3 (96)
33	2	1283	109	27	364	DimaN	2004-03-01	7.7 (350)
35	3	603	108	13	695	Baser	2015-09-18	8.7 (176)
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	523	104	3	268	Serge I	2015-01-10	8.6 (152)
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	973	103	14	403	Serge I	2003-06-05	7.7 (157)
305	1	25	101	0	160	Baser	2017-01-06	9.0 (14)
90	1	242	100	1	499	Dmitrij Grinkevich	2012-03-03	8.0 (87)
44	2	762	99	8	273	Serge I	2011-11-25	7.9 (238)
73	1	466	97	3	367	Ruslan1707	2010-11-02	7.5 (153)
17	2	1681	97	24	122	VIG	2003-04-29	8.2 (327)
46	2	1220	96	127	340	Serge I	2009-08-12	6.8 (326)
70	1	682	95	3	334	Serge I	2009-04-17	7.9 (222)
6	2	2113	95	110	281	Serge I	2005-05-07	8.0 (375)
113	1	138	91	0	497	smog	2013-03-29	8.6 (58)
103	1	143	86	1	850	Baser	2013-10-05	7.4 (58)
114	1	454	83	4	298	Serge I	2003-12-24	8.4 (97)
256	1	39	82	1	436	anddros	2013-11-08	8.9 (20)
24	2	1648	79	6	685	Aaz	2004-02-26	7.0 (463)
26	1	1508	78	25	289	VIG	2003-12-22	7.7 (361)
25	2	1258	75	29	232	DimaN	2004-06-22	7.1 (328)
9	2	1448	72	31	498	vasia armor	2010-05-21	8.0 (421)
10	1	778	72	50	179	Serge I	2017-01-20	8.0 (217)
28	1	1239	68	10	283	ZrenBy	2003-09-01	7.6 (237)
8	2	1540	66	95	600	Serge I	2008-06-21	7.7 (382)
21	1	1237	63	9	709	paparome	2006-03-14	8.1 (282)
97	1	374	63	3	231	dimzv	2004-03-01	7.7 (83)
112	1	43	62	2	393	Gosha	2020-06-03	9.0 (21)
50	1	558	58	18	421	mslava	2003-12-23	7.2 (109)
32	1	1389	56	7	603	Roman Golubin	2005-12-13	7.5 (318)
42	1	1640	55	14	249	Serge I	2003-06-05	7.7 (325)
18	1	1662	55	10	157	ZrenBy	2003-09-01	7.7 (364)
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	1304	51	9	376	Fiolent	2004-02-26	7.4 (302)
48	1	1182	51	6	252	Serge I	2009-06-22	7.4 (313)
30	1	1778	50	3	205	Serge I	2003-08-28	7.9 (393)
19	1	2025	47	23	269	Serge I	2004-06-23	7.5 (417)
22	1	1650	47	12	270	ZrenBy	2003-09-01	7.3 (381)
14	1	2486	47	37	116	Serge I	2003-04-08	7.6 (437)
56	1	1076	47	3	565	Fiolent	2004-06-22	8.0 (283)
63	1	1356	46	5	190	VIG	2003-06-05	7.6 (246)
302	0	37	45	0	510	pegoopik	2012-07-27	7.6 (11)
31	1	1071	44	6	349	Fiolent	2004-06-22	7.9 (263)
13	1	1769	40	21	194	ZrenBy	2003-09-01	7.5 (411)
306	1	9	39	0	363	Baser	2022-04-29	7.4 (5)
53	1	1488	38	25	234	DimaN	2004-03-01	7.6 (386)
88	2	37	37	1	293	Serge I	2021-10-15	9.2 (15)
15	1	1250	35	8	287	Dmitrij Grinkevich	2012-04-21	7.6 (330)
11	1	1950	34	15	130	ZrenBy	2003-09-01	7.5 (440)
258	3	25	13	0	1070	Baser	2014-09-19	7.6 (10)
301	0	44	8	0	55	pegoopik	2012-03-23	8.7 (21)

Home
Week news

Certification

SQL exercises

Forums

Ratings

HELP

Performance

Profile
References