Poll
For what DBMS, besides SQL Server, you would like to have exercises on the site?
Oracle
57%
MySQL
27.8%
PostgreSQL
7.6%
Nothing is necessary any more
4%
Another
3.7%
Total Votes: 11654
Rating of second-stage exercises 
No - exercise number; Bonus - level of difficulty; Solved - number of visitors, who have solved this exercise; Time(min) - the average time 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); Rank - average score on a result of voting.
No Bonus Solved Time(min) noOK Author Date Rank
251 4 48 54752 3 paparome 2006-10-01 6.6
165 2 5 51099 1 vlksm 2010-03-18 10.0
149 3 16 47146 2 $erges 2008-09-08 9.9
157 3 9 40892 2 anddros 2009-06-05 7.7
138 4 88 32705 26 Cyrilus 2005-12-09 9.4
151 3 18 18920 2 anddros 2008-12-30 9.6
121 3 270 18752 4 ZrenBy 2004-02-26 7.3
143 5 21 16696 11 inkerman 2007-10-07 8.8
161 3 7 14746 3 Ozzy 2009-11-06 9.4
62 1 880 13489 15 Serge I 2004-06-23 7.2
163 3 7 12433 0 Ozzy 2010-01-08 9.3
153 3 15 12353 3 Ozzy 2009-02-14 9.3
155 3 9 10681 3 vlksm 2009-04-17 10.0
106 3 117 9925 5 vlksm 2008-11-27 8.9
253 3 18 8942 5 $erges 2008-05-17 10.0
147 4 4 7246 0 $erges 2010-08-06 10.0
252 2 19 7171 2 Ozzy 2009-06-14 6.6
152 3 21 6682 2 vlksm 2009-01-05 9.8
167 3 3 6060 2 qwrqwr 2010-07-28 10.0
139 2 70 5807 2 Snowbear 2006-09-09 8.2
154 4 9 5567 3 anddros 2009-03-18 10.0
144 4 22 5347 2 pvv 2008-01-01 8.0
160 3 11 5271 1 Ozzy 2009-08-07 9.4
132 3 25 5234 1 risp 2010-01-25 8.3
137 4 127 5118 22 Cyrilus 2005-03-06 9.3
146 3 28 4355 2 paparome 2008-01-22 9.9
116 4 90 4150 16 $erges 2008-12-13 9.5
123 3 103 4114 44 Ozzy 2009-08-22 8.9
150 4 18 4062 2 @Nikotin 2008-11-09 9.3
159 3 8 3922 0 anddros 2009-08-24 8.8
126 3 82 3706 5 $erges 2008-09-07 8.7
164 2 10 3439 1 anddros 2010-04-26 9.7
65 2 154 2940 25 Ozzy 2010-01-29 7.9
148 2 24 2645 7 vlksm 2008-09-06 9.1
141 4 43 2634 5 vlksm 2006-10-29 9.1
98 3 380 2633 37 ZrenBy 2003-09-01 8.1
96 3 191 2626 88 anddros 2008-11-22 8.3
158 3 7 2290 0 Ozzy 2010-04-09 9.5
145 3 38 2089 1 pvv 2008-01-07 8.9
156 2 21 1737 2 anddros 2009-04-17 9.6
100 3 34 1692 2 qwrqwr 2010-04-27 9.6
87 3 395 1594 77 Roman Golubin 2006-07-14 9.3
72 3 664 1585 140 paparome 2005-12-03 9.2
162 2 14 1394 1 Ozzy 2009-12-26 9.6
110 3 277 1199 9 Snowbear 2006-03-14 8.8
169 3 2 1076 0 Valdaj 2010-09-02 10.0
140 2 23 1018 0 _Bkmz_ 2010-01-30 8.8
69 2 466 1015 8 Roman Golubin 2005-12-13 7.6
142 2 63 994 0 paparome 2007-03-24 8.7
125 3 234 875 5 dimzv 2004-02-29 8.6
85 3 76 842 5 Ozzy 2009-10-10 8.1
68 2 700 819 97 Palkin 2007-03-29 8.2
118 2 283 707 2 Fiolent 2004-01-05 8.3
134 3 102 704 3 pvv 2008-01-22 8.5
88 1 188 685 1 $erges 2008-09-06 6.2
89 3 185 673 23 _Bkmz_ 2008-06-21 8.2
168 2 2 645 2 qwrqwr 2010-08-27 10.0
114 3 298 594 5 Serge I 2003-12-24 8.3
122 3 249 586 11 Fiolent 2004-02-26 7.6
109 3 335 566 1 VIG 2003-12-23 7.8
76 2 87 507 5 silver 2010-01-23 8.5
129 3 185 504 7 DimaN 2004-03-01 7.6
130 2 18 503 0 anddros 2010-05-22 10.0
67 3 87 469 10 Ozzy 2010-04-27 8.0
84 2 109 453 11 Ozzy 2009-12-26 7.9
74 2 304 446 11 vlksm 2008-06-21 8.0
166 1 15 405 0 anddros 2010-07-26 9.1
60 1 1343 393 120 Serge I 2005-03-05 7.0
136 3 163 389 0 Fiolent 2004-06-23 7.7
66 2 171 368 32 anddros 2009-12-26 7.9
111 3 299 327 3 Fiolent 2005-01-19 8.4
92 2 339 312 9 paparome 2006-07-26 8.4
124 3 241 307 2 DimaN 2004-02-26 8.0
54 1 565 306 49 Ozzy 2008-09-06 7.9
63 3 1315 282 74 Serge I 2003-04-08 8.0
97 2 429 266 1 ZrenBy 2003-09-01 7.4
75 3 728 254 9 VIG 2003-04-29 7.6
112 2 280 252 4 VIG 2005-06-26 7.2
82 2 55 248 1 _Virt_ 2010-04-27 7.4
128 2 133 217 5 inkerman 2007-09-14 8.3
71 2 120 213 5 anddros 2009-12-26 8.9
103 3 354 205 1 VIG 2003-12-22 8.2
79 2 656 203 14 Serge I 2003-06-05 7.0
86 1 52 203 0 Ozzy 2010-03-05 9.2
107 2 264 198 3 lepton 2006-09-29 8.3
49 1 368 196 22 anddros 2009-06-05 7.3
52 1 913 191 26 mslava 2003-09-01 6.5
115 3 296 184 1 Serge I 2003-12-26 7.8
50 1 1085 182 34 Serge I 2003-04-09 6.5
64 2 1115 172 15 Serge I 2005-05-07 7.1
42 2 759 172 9 Serge I 2003-06-05 6.7
77 2 449 169 11 yuriy.rozhok 2007-03-24 7.7
133 1 171 133 0 DimaN 2004-06-22 6.4
81 2 278 132 13 $erges 2008-05-10 7.7
45 2 166 125 1 vasia armor 2010-05-21 7.0
90 3 487 121 4 VIG 2003-09-01 7.3
83 2 605 118 2 Serge I 2003-08-28 6.5
40 2 728 117 3 Serge I 2003-08-28 7.0
113 2 257 105 0 paparome 2006-03-14 7.3
117 2 286 100 0 Fiolent 2003-12-26 6.8
95 2 293 100 1 Fiolent 2004-06-22 7.2
119 2 280 97 0 mslava 2004-01-05 7.1
57 2 1249 92 26 Serge I 2003-04-08 7.2
99 2 38 89 0 qwrqwr 2010-05-13 7.7
108 3 338 87 0 mslava 2003-12-23 7.0
93 2 465 85 0 ZrenBy 2003-09-01 7.0
70 1 246 84 3 Serge I 2009-04-17 7.8
78 2 61 83 1 _ORA_ 2010-04-27 7.0
61 2 186 81 3 risp 2009-12-26 8.1
105 3 349 75 0 mslava 2003-12-22 8.1
41 1 188 73 27 qwrqwr 2010-04-26 7.4
127 2 207 63 2 dimzv 2004-03-01 7.0
102 2 361 60 1 ZrenBy 2003-09-01 6.2
131 1 176 59 1 Serge I 2004-06-22 6.3
51 1 155 59 4 qwrqwr 2010-05-01 6.8
43 1 442 51 2 Aaz 2004-02-26 6.1
135 1 119 51 0 Serge I 2007-09-07 7.4
58 1 1202 48 53 Serge I 2006-11-17 7.5
101 2 363 48 0 ZrenBy 2003-09-01 7.0
37 1 1395 47 56 paparome 2005-12-02 7.3
120 2 278 47 0 Fiolent 2004-02-26 5.7
39 1 605 46 0 ZrenBy 2003-09-01 6.5
53 1 698 44 28 DimaN 2004-03-01 7.3
94 2 455 44 1 ZrenBy 2003-09-01 6.4
104 2 351 41 1 VIG 2003-12-22 7.2
55 1 625 40 71 Serge I 2008-06-21 6.7
35 1 1454 38 17 Serge I 2003-04-08 6.4
73 2 227 36 1 Fiolent 2004-06-22 6.8
56 1 868 33 43 VIG 2003-09-01 6.0
44 1 472 32 2 ZrenBy 2003-09-01 6.2
80 2 639 32 4 VIG 2003-06-05 6.6
36 2 719 30 2 Serge I 2003-08-28 7.1
38 2 511 29 3 ZrenBy 2003-09-01 6.6
91 2 202 29 2 DimaN 2004-03-01 7.0
47 1 1372 27 18 Serge I 2005-01-19 6.1
48 1 338 26 7 Serge I 2009-06-22 6.9
46 1 358 24 126 Serge I 2009-08-12 5.9
59 1 141 19 0 qwrqwr 2010-04-26 7.2
33 1 1056 17 6 Serge I 2003-04-29 6.8
32 1 732 15 3 Serge I 2003-08-28 6.3
34 1 762 14 3 Serge I 2003-08-28 6.4