A name cannot be the same as another PostgreSQL object that has the same type. ; Second, provide name of the column that you want to rename after the RENAME COLUMN keywords. ALTER TABLE test RENAME COLUMN sum TO "group"; Note that when using quoted idenfifiers, you need to always quote it. The first character in a name can be a letter, @, _, or #. In this statement: First, specify the name of the table that contains the column which you want to rename after the ALTER TABLE clause. bad: cast varchar(256), good: "cast" varchar(256) However, the problem is that all of the built in Postgres handling for queries do not wrap field names in double quotes. This issue is part of [#2157455]. Is "type" a reserved word in mysql, Avoid using ISO reserved keywords for object names and identifiers. Can we use MySQL keyword as alias name for a column? How can we use the MySQL reserved words as an identifier? Use double quotes and be sure to use the case that the column name was defined with, default is UPPER case. While creating a MySQL table use the reserved keyword ‘Key’ Can we use “rank” as column name with MySQL8? E.g. The ODBC reserved keyword list, shown in the following table, is the same Transact-SQL reserved keywords can be used as identifiers or names of databases or database objects, such as tables, columns, views, and so on. To use a reserved word or a name with "illegal" characters (such as a space) for an identifier, you need to quote the identifier. I am not sure how you created that table b/c at times Postgres will automatically quote things even without you knowing it. "group" is a different column name than "GROUP". need help specifying potentially reserved words as strings in postgres query. Proposed resolution Add new reserved words for PostgreSQL … By using column aliases, the query output can become more meaningful. And it becomes case sensitive. How can we use MySQL function STR_TO_DATE(Column, ‘%input_format’)? "COLUMN" = 'description' I can NOT get this to work as the parser seems to pick up "percent" as a function and confuse the SQL when it … Also, we can use reserved keywords as a column alias, but not for tables. postgresql. A name cannot be a PostgreSQL reserved word, such as WHERE or VIEW. A name can contain up to 128 characters. One of the legacy columns is called "percent" (as reserved word). Eg. ... AND translations. As this is somehow not a problem for MySQL we decided to add support for PostgreSQL also by adding quotes where needed. – 32bitfloat Sep 12 '12 at 15:25 It acts as if your GUI tool passed an uppercase column name, including double quotes, to PostgreSQL. The keyword AS can be used between the column or table name and the alias name, but this is optional. What I wanted to know is, why the word ID has to be quoted, or which functionality is connected to ID, that I have to quote it for using it as a column name. ; The COLUMN keyword in the statement is optional therefore you can omit it like this: Apparently 'cast' is a reserved word in Postgres and you cannot have a field by that name, you can however declare it as long as it is double quoted. When copying the military features schema to a postgres database the entity column is changed to database.table.entity because the entity field appears to be a reserved keyword. I want to use the legacy tables to create a view to perform calcuations using SUM(). Is name a reserved word in MySQL? Postgres differentiates from the reserved word by putting it in quotes. ; Third, specify the new name for the column after the TO keyword. A table alias is helpful for user convenience and ease of use for complex queries. 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