Inconsistent data type usage in case of registering sums of money

Query goal:

Find as to whether both the numeric type and integer types are used in case of columns that are meant for register data about prices.

Notes about the query:

The query considers both column names in English and Estonian.

Query type:

Problem detection (Each row in the result could represent a flaw in the design)

Query reliability:

Medium (Medium number of false-positive results)

Query license:

MIT License

Data source:

INFORMATION_SCHEMA only

SQL query:

Click on query to copy it

WITH money_cols AS (SELECT table_schema, table_name, column_name, ordinal_position, data_type
FROM INFORMATION_SCHEMA.columns
WHERE  column_name~*'(hind|maksumus|price|cost)[[:digit:]]*$'
AND (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') 
AND table_schema NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL))
SELECT data_type, Count(*) AS nr_of_occurrences, string_agg( table_schema || '.' || table_name || '.' || column_name,';<br>' ORDER BY ordinal_position) AS columns
FROM money_cols
GROUP BY data_type
HAVING (SELECT Count(*) AS c
FROM (SELECT Count(*) AS nr_of_occurrences
FROM money_cols
GROUP BY data_type) AS foo)>1
ORDER BY Count(*) DESC, data_type;

Collections where the query belongs to

Collection name	Collection description
Find problems about base tables	A selection of queries that return information about the data types, field sizes, default values as well as general structure of base tables. Contains all the types of queries - problem detection, software measure, and general overview
Find problems automatically	Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

Collection name

Collection description

Find problems about base tables

A selection of queries that return information about the data types, field sizes, default values as well as general structure of base tables. Contains all the types of queries - problem detection, software measure, and general overview

Find problems automatically

Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

Categories where the query belongs to

Category name	Category description
Data types	Queries of this category provide information about the data types and their usage.
Inconsistencies	Queries of this catergory provide information about inconsistencies of solving the same problem in different places.
Result quality depends on names	Queries of this category use names (for instance, column names) to try to guess the meaning of a database object. Thus, the goodness of names determines the number of false positive and false negative results.

Category name

Category description

Data types

Queries of this category provide information about the data types and their usage.

Inconsistencies

Queries of this catergory provide information about inconsistencies of solving the same problem in different places.

Result quality depends on names

Queries of this category use names (for instance, column names) to try to guess the meaning of a database object. Thus, the goodness of names determines the number of false positive and false negative results.