How to select all columns in a PostgreSQL query?

How to select all columns in a PostgreSQL query?

The following query uses the SELECT statement to select data from all columns of the customer table: In this example, we used an asterisk ( *) in the SELECT clause, which is a shorthand for all columns. Instead of listing all columns in the SELECT clause, we just used the asterisk ( *) to save some typing.

When to use semicolon in PostgreSQL SELECT statement?

The semicolon is not a part of the SQL statement. It is used to signal PostgreSQL the end of an SQL statement. The semicolon is also used to separate two SQL statements. 2) Using PostgreSQL SELECT statement to query data from multiple columns example

How to execute a query against a PostgreSQL database?

Note that if you don’t know how to execute a query against the PostgreSQL database using the psql command-line tool or pgAdmin GUI tool, you can check it out the connecting to PostgreSQL database tutorial. One of the most common tasks, when you work with the database, is to query data from tables by using the SELECT statement.

When to omit the FROM clause in PostgreSQL select?

The select list may also contain expressions or literal values. Second, specify the name of the table from which you want to query data after the FROM keyword. The FROM clause is optional. If you do not query data from any table, you can omit the FROM clause in the SELECT statement.

When to put comma between columns in PostgreSQL select?

Let’s examine the SELECT statement in more detail: First, specify a select list that can be a column or a list of columns in a table from which you want to retrieve data. If you specify a list of columns, you need to place a comma (,) between two columns to separate them.

When to use an asterisk in PostgreSQL select?

If you specify a list of columns, you need to place a comma (,) between two columns to separate them. If you want to select data from all the columns of the table, you can use an asterisk ( *) shorthand instead of specifying all the column names. The select list may also contain expressions or literal values.