Попов, Сергей Геннадьевич. Исследование алгоритмов декомпозиции и выполнения запросов на выборку в гетерогенных системах управления реляционными базами данных / С. Г. Попов, А. А. Пурий. — 1 файл (1,08 Мб). — DOI 10.18721/JCSTCS.12205 // Научно-технические ведомости Санкт-Петербургского государственного политехнического университета. Сер.: Информатика. Телекоммуникации. Управление = St. Petersburg state polytechnical university journal. Computer science. Telecommunications and control systems: научное издание. – 2019. – Т. 12, № 2. — Загл. с титул. экрана. — Электронная версия печатной публикации. — Свободный доступ из сети Интернет (чтение, печать, копирование). — <URL:http://elib.spbstu.ru/dl/2/j19-412.pdf>. — <URL:http://dx.doi.org/10.18721/JCSTCS.12205>.
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Period
|
Read
|
Print
|
Copy
|
Open
|
Total
|
|
Year 2020
|
Quarter 1
|
February
|
3
|
0
|
2
|
0
|
5
|
|
March
|
10
|
0
|
2
|
0
|
12
|
|
Quarter 2
|
April
|
8
|
0
|
0
|
0
|
8
|
|
May
|
3
|
0
|
0
|
0
|
3
|
|
June
|
2
|
0
|
0
|
0
|
2
|
|
Quarter 3
|
July
|
3
|
0
|
0
|
0
|
3
|
|
August
|
0
|
0
|
0
|
0
|
0
|
|
September
|
5
|
0
|
0
|
0
|
5
|
|
Quarter 4
|
October
|
6
|
0
|
1
|
0
|
7
|
|
November
|
2
|
0
|
3
|
0
|
5
|
|
December
|
0
|
0
|
7
|
0
|
7
|
|
Year 2021
|
Quarter 1
|
January
|
3
|
0
|
3
|
0
|
6
|
|
February
|
6
|
0
|
0
|
0
|
6
|
|
March
|
0
|
0
|
2
|
0
|
2
|
|
Quarter 2
|
April
|
0
|
0
|
2
|
0
|
2
|
|
May
|
1
|
0
|
0
|
0
|
1
|
|
June
|
5
|
0
|
3
|
0
|
8
|
|
Quarter 3
|
July
|
2
|
0
|
8
|
0
|
10
|
|
August
|
4
|
0
|
1
|
0
|
5
|
|
September
|
1
|
0
|
3
|
0
|
4
|
|
Quarter 4
|
October
|
0
|
0
|
7
|
0
|
7
|
|
November
|
2
|
0
|
4
|
0
|
6
|
|
December
|
3
|
0
|
2
|
0
|
5
|
|
Year 2022
|
Quarter 1
|
January
|
2
|
0
|
7
|
0
|
9
|
|
February
|
3
|
0
|
4
|
0
|
7
|
|
March
|
3
|
0
|
2
|
0
|
5
|
|
Quarter 2
|
April
|
0
|
0
|
2
|
0
|
2
|
|
May
|
4
|
0
|
0
|
0
|
4
|
|
June
|
1
|
0
|
6
|
0
|
7
|
|
Quarter 3
|
July
|
4
|
0
|
0
|
0
|
4
|
|
August
|
3
|
0
|
1
|
0
|
4
|
|
September
|
2
|
0
|
4
|
0
|
6
|
|
Quarter 4
|
October
|
2
|
0
|
3
|
0
|
5
|
|
November
|
3
|
0
|
1
|
0
|
4
|
|
December
|
6
|
0
|
5
|
0
|
11
|
|
Year 2023
|
Quarter 1
|
January
|
1
|
0
|
0
|
0
|
1
|
|
February
|
2
|
0
|
3
|
0
|
5
|
|
March
|
5
|
0
|
4
|
0
|
9
|
|
Quarter 2
|
April
|
0
|
0
|
1
|
0
|
1
|
|
May
|
5
|
0
|
2
|
0
|
7
|
|
June
|
2
|
0
|
1
|
0
|
3
|
|
Quarter 3
|
July
|
0
|
0
|
1
|
0
|
1
|
|
August
|
0
|
0
|
3
|
0
|
3
|
|
September
|
2
|
0
|
3
|
0
|
5
|
|
Quarter 4
|
October
|
1
|
0
|
3
|
0
|
4
|
|
November
|
7
|
0
|
6
|
0
|
13
|
|
December
|
1
|
0
|
2
|
0
|
3
|
|
Year 2024
|
Quarter 1
|
January
|
1
|
0
|
6
|
0
|
7
|
|
February
|
0
|
0
|
1
|
0
|
1
|
|
March
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 2
|
April
|
7
|
0
|
1
|
0
|
8
|
|
Total
|
136
|
0
|
123
|
0
|
259
|
