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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
200
1
User-defined routines
181
2
Validity and completeness
150
3
CHECK constraints
126
4
Data types
120
5
Derived tables
114
6
Relationships between tables
114
6
Comfortability of database evolution
112
7
Comfortability of data management
100
8
Inconsistencies
91
9
Does not work in some earlier PostgreSQL version
90
10
Triggers and rules
85
11
Result quality depends on names
83
12
Uniqueness
81
13
Performance
73
14
Default value
63
15
Security
59
16
Duplication of implementation elements
51
17
Domains
46
18
Missing data
44
19
Sequence generators
29
20
Structure of base tables
29
20
Regular expressions
27
21
Temporal data
25
22
Boolean data
24
23
Syntactics
23
24
Data at the database physical level
22
25
Database design antipatterns
19
26
Compensating actions
17
27
Unused implementation elements
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
Assessment
11
32
Comments
11
32
Hierarchical data
11
32
User-defined types
11
32
Concurrency control
10
33
Fatal problems
10
33
State machine
10
33
Case sensitivity vs. case insensitivity
9
34
Full text search
7
35
Stubs
7
35
TOAST
7
35
Classifier tables
6
36
Extensions
6
36
Generated columns
6
36
Overloading
5
37
Data redundancy
3
38
Read user data
3
38
Schemas
3
38