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Column aliases. In MySQL, you use column aliases to assign a temporary name to a column in the query’s result set. For example, column names sometimes are so technical that make the query’s output very difficult to understand. To give a column a descriptive name, you can use a column alias. The following statement illustrates how to use the ...
Alias for Tables Example. The following SQL statement selects all the orders from the customer with CustomerID=4 (Around the Horn). We use the "Customers" and "Orders" tables, and give them the table aliases of "c" and "o" respectively (Here we use aliases to make the SQL shorter):
1) SQL Server ALIAS – column alias examples. We can see above that the table names and column names are long and complex. We can run the below query using the ALIAS feature to represent the columns in the resultset with simple easy names. Please note that if the alias name contains space it must be within quotes.
Mar 3, 2024 · When you want to rename a table or a column in your result set, you can use an alias. This is particularly useful when the original table or column names are lengthy or not very descriptive. To alias a column, you simply add the AS keyword followed by the alias name after the column name in your SELECT statement.
Jun 10, 2023 · An SQL column alias is a name that you can give to a column in a query. One of the most common ways to use it is in a SELECT query. The syntax for doing this is: SELECT. column1 [AS] colname. …. This means: column1 is the column name in the database. It can also be an expression or a function.
An alias is a feature of SQL that is supported by most, if not all, relational database management systems (RDBMSs). Aliases provide users with the ability to reduce the amount of code required for a query, and to make queries simpler to understand.
Sep 14, 2021 · Let’s look at the syntax of how to use aliases in a subquery. SELECT column_1, column_2 = (SELECT COUNT(t2.id) FROM table_2 t2. WHERE t2.id = t1.id) FROM table_1 t1. The subquery is the part of the query in bold type. You can see how aliases help us access the correct table at each part of the query.
