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Currently the catalog has
54
active categories with at least one query.
Number of queries in different categories
Category name
Number of queries
Ranking based on number of queries
Naming
205
1
User-defined routines
191
2
Validity and completeness
151
3
CHECK constraints
139
4
Derived tables
123
5
Data types
121
6
Relationships between tables
114
7
Comfortability of database evolution
113
8
Comfortability of data management
101
9
Inconsistencies
99
10
Triggers and rules
94
11
Does not work in some earlier PostgreSQL version
90
12
Result quality depends on names
86
13
Uniqueness
83
14
Performance
80
15
Default value
67
16
Security
59
17
Duplication of implementation elements
54
18
Domains
49
19
Missing data
45
20
Regular expressions
31
21
Structure of base tables
31
21
Sequence generators
30
22
Data at the database physical level
25
23
Syntactics
25
23
Temporal data
25
23
Boolean data
24
24
Unused implementation elements
20
25
Database design antipatterns
19
26
Compensating actions
17
27
Field size
16
28
Table inheritance
16
28
System-defined functions
15
29
Transactions
14
30
Data at the database logical level
13
31
Distributed database
13
31
Comments
12
32
Assessment
11
33
Hierarchical data
11
33
User-defined types
11
33
Concurrency control
10
34
Fatal problems
10
34
State machine
10
34
Case sensitivity vs. case insensitivity
9
35
Classifier tables
7
36
Full text search
7
36
Stubs
7
36
TOAST
7
36
Extensions
6
37
Generated columns
6
37
Overloading
6
37
Data redundancy
3
38
Read user data
3
38
Schemas
3
38