What symbols are used to concatenate strings in oracle

Oracle uses the double pipe symbol (||) to concatenate strings, which acts as a concatenation operator to combine string values ​​into a new string. It can connect string values ​​of different data types, including literals, variables, expressions, and column values, for concatenating strings, adding prefixes and suffixes, and formatting output.

Oracle uses the double pipe symbol (||) to concatenate strings.

The double vertical bar symbol represents the concatenation operator, which can connect two or more string values ​​together to form a new string value. For example:

<code class="sql">SELECT 'Hello' || ' ' || 'World' FROM dual;</code>

Output result:

<code>Hello World</code>

In Oracle, the double vertical bar symbol can connect string values ​​​​of different data types, including:

• String Text
• String variable
• String expression
• String column value

The use of double vertical bar symbols is very flexible and can be used for various string manipulation scenarios. For example:

• Splicing strings: Connect multiple string fragments to form a complete string.
• Add prefix or suffix: Add extra characters or strings before or after a string.
• Format string: Use placeholders and formatting options to generate formatted string output.

It is important to understand the use of the double pipe symbol in Oracle because it provides an efficient and flexible way to concatenate strings.

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