When you create an object in PostgreSQL, you give that object a name. Several weeks ago I asked on Twitter for SQL schema naming conventions from DBA professionals. Postgres already has an implicit naming convention in place, which goes like this: {tablename}_{columnname(s)}_{suffix} pkey for primary key constraints. PostgreSQL uses a single type to define all object names: the name type.. A value of type name is a string of 31 or fewer characters [1].A name must start with a letter or an underscore; the rest of the string can contain letters, digits, and underscores. Our company, JackDB, uses PostgreSQL internally to store persistent state and the naming conventions in this post were written with PostgreSQL in mind. PostgreSQL includes a sizable set of built-in data types that fit many applications. We have some stored procedures with 20 parameters and it would be painful to work with $1, $17 etc etc – uriDium Aug 4 '14 at 13:27 PostgreSQL Naming Rules. SQL Schema Naming Conventions. A schema named as the notified fiware-service header value (or, in absence of such a header, the defaulted value for the FIWARE service) is created (if not existing yet). When you create an object in PostgreSQL, you give that object a name. Most of the recommendations should be equally valid for other relational databases such as MySQL, Oracle, or Microsoft SQL Server. Users can also define their own data types. PostgreSQL schemas naming conventions. In many languages, naming conventions (of identifiers) is not really relevant, because the way the language designs namespacing, there is relatively little risk for conflict. Just as we start by defining the Java model, in code-first migration approach, we write the SQL schema and apply it to the PostgreSQL database. Every table has a name, every column has a name, and so on. PostgreSQL uses a single data type to define all object names: the name type. Then we create the JPA repositories and Java entities around this SQL schema. (I'm always interested in the generally-accepted practices of related professions; when I can, I try to make my work as compatible with theirs as possible.) In this post I've put together some of the naming conventions, rules, and ideas that I tend to follow when creating database schemas to work with. Tip: When you create many interrelated tables it is wise to choose a consistent naming pattern for the tables and columns. Sometimes it's necessary to manually specify a constraint name, which should then ideally follow some sort of naming convention or pattern. Top. Every table has a name, every column has a name, and so on. This also applies to schema-less databases, distributed systems databases, graph, time series, or whatever else I am working with. A value of type name is a string of 63 or fewer characters 1. A database contains one or more named schemas, which in turn contain tables.Schemas also contain other kinds of named objects, including data types, functions, and operators. 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