Oracle Field Concatenation Method

In Oracle, the “||” operator can be used to concatenate fields. This operator can be used to join two strings or fields and return a new string.

For example, you can use the following syntax to concatenate two fields:

SELECT column1 || column2 AS new_column FROM table_name;

In this example, “column1” and “column2” are the two fields to be concatenated, and “new_column” is the alias for the new field.

Additionally, you can insert other characters such as spaces, commas, etc., in the concatenated string, as shown below:

SELECT column1 || ' ' || column2 || ', ' || column3 AS new_column FROM table_name;

In this example, concatenate three fields with spaces and commas, and store the result in “new_column”.

It is important to note that the concatenated fields must have the same data type, otherwise errors may occur. If the fields have different data types, you can use the “TO_CHAR” function to convert them to the same data type before concatenating.

SELECT TO_CHAR(column1) || TO_CHAR(column2) AS new_column FROM table_name;

In this way, different data types of fields can be concatenated together.