How to splice fields in oracle

In Oracle, use the following method to concatenate string fields: Use the CONCAT function: CONCAT(string1, string2, ...) Use the string concatenation operator: || Use the LTRIM and RTRIM functions to remove spaces: LTRIM (string) and RTRIM(string)

Method of splicing fields in Oracle

In Oracle, you can pass Use the CONCAT function to concatenate two or more string fields. The syntax of the CONCAT function is as follows:

<code>CONCAT(string1, string2, ...)</code>

Among them, parameters such as string1 and string2 are the string fields to be spliced.

Example:

Suppose there are two fields First_Name and Last_Name. The values ​​of these two fields should be spliced ​​into For a full name, you can use the following query:

<code>SELECT CONCAT(First_Name, ' ', Last_Name) AS Full_Name
FROM table_name;</code>

Executing this query will return a new result set containing the Full_Name field, whose values ​​are First_Name and Last_Name is formed by concatenating field values.

Use other functions to splice fields:

In addition to the CONCAT function, there are some other functions that can be used to splice fields:

• ||: String concatenation operator, similar to CONCAT function.
• LTRIM and RTRIM: Remove spaces at the beginning or end of the string.

Example:

Use || Operator:

<code>SELECT First_Name || ' ' || Last_Name AS Full_Name
FROM table_name;</code>

Use LTRIM and RTRIM function:

<code>SELECT LTRIM(RTRIM(First_Name)) || ' ' || LTRIM(RTRIM(Last_Name)) AS Full_Name
FROM table_name;</code>

Both methods can splice fields, but the CONCAT function is usually preferred because it is easier to understand and use.

The above is the detailed content of How to splice fields in oracle. For more information, please follow other related articles on the PHP Chinese website!