Database Object Name

1. General
Do not use capital letters
Neither table names nor column names use uppercase letters.
× Documents
〇 documents

2. Cooperation of multiple words is a snake case
Use snake case for both table name and column name. Camel case, camel back is NG.
× tableName
× TableName
× tablename
〇 table_name

3. English notation
Basically not in roman letters, but in English. Do not use abbreviations.