How Can I Concatenate Multiple Oracle SQL Columns with Custom Text?

Combining Oracle SQL Columns with Added Text: Two Approaches

This guide demonstrates how to combine multiple columns in Oracle SQL, adding custom text to create a formatted output string. The goal is to produce a single column containing values from three source columns, interspersed with specific text.

Oracle offers two primary methods for string concatenation: the CONCAT function and the || operator.

Method 1: Using the CONCAT Function

The CONCAT function allows nested concatenation. This example shows how to achieve the desired formatted output:

<code class="language-sql">CONCAT(
  CONCAT(
    CONCAT(
      CONCAT(
        CONCAT('I like ', t.type_desc_column), 
        ' cake with '), 
      t.icing_desc_column),
    ' and a '),
  t.fruit_desc_column)</code>

Here, t represents the table containing type_desc_column, icing_desc_column, and fruit_desc_column.

Method 2: Using the || Operator

The || operator provides a more concise way to concatenate strings. The same result can be achieved as follows:

<code class="language-sql">'I like ' || t.type_desc_column || ' cake with ' || t.icing_desc_column || ' and a ' || t.fruit_desc_column</code>

Both methods effectively combine column values with the specified text, yielding the desired custom output string. The || operator is generally preferred for its readability and simplicity in most cases.

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