How Can I Properly Insert Single Quotes into VARCHAR Columns in Oracle SQL?

Handling single quotes in Oracle SQL

When inserting data containing single quote characters into a column with a VARCHAR data type, it is critical to handle single quotes correctly to avoid syntax errors.

Solution

There are two main ways to handle single quotes in Oracle SQL:

Use double single quotes

To insert single quotes into a VARCHAR column, use two consecutive single quotes. For example:

<code class="language-sql">INSERT INTO table_name (column_name) VALUES ('D''COSTA');</code>

This will insert the value "D'COSTA" into the specified column.

Use new reference method (Oracle 10g)

Oracle 10g and later allows you to use a new reference method:

<code class="language-sql">INSERT INTO table_name (column_name) VALUES q'$D'COSTA$';</code>

In this method, the value is enclosed in two single quotes, preceded by the letter "q".

Example:

The following query demonstrates the use of these methods:

<code class="language-sql">SELECT 'D''COSTA' name FROM DUAL;
SELECT q'$D'COSTA$' NAME FROM DUAL;</code>

Both queries will return the value of "D'COSTA".

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