1. Use the concat() function
Use the concat() function to merge two or more strings.
Example:
SELECT concat('Hello', ' ', 'World');Output:
Hello World
2. Use the || operator
Two or more strings can also be merged using the || operator.
Example:
SELECT 'Hello' || ' ' || 'World';
Output:
Hello World
3. Use concat_ws() function
Use the concat_ws() function to merge multiple strings and separate them by specifying a delimiter.
Example:
SELECT CONCAT_WS(', ', 'apple', 'banana', 'orange');Output:
apple, banana, orange
4. Use the format() function
Use the format() function to format strings and merge multiple strings into one string.
Example:
SELECT format('%s %s world', 'hello', 'cruel');Output:
hello cruel world
The above are all commonly used splicing string methods in PostgreSQL. Depending on the specific situation, you can choose the method that suits you to splice the string.
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