In SQL, string concatenation is the process of combining two or more strings together to form a single string. The operator used to concatenate strings in SQL is typically the || operator, which is short for “concatenation”. This operator can be used to concatenate strings in a SELECT statement, in a SET statement, or in a VALUES clause.
Here’s an example of using the || operator to concatenate two strings in a SELECT statement:
SELECT'Hello, '||name ||'!'ASgreeting FROMemployees;This query selects the greeting for each employee by concatenating the string ‘Hello, ‘, the name of the employee, and the exclamation mark ‘!’.
In some databases such as MySQL, the CONCAT() function can be used instead of the || operator to concatenate strings. The CONCAT() function takes two or more strings as arguments and returns a single concatenated string:
SELECTCONCAT('Hello, ', name, '!') ASgreeting FROMemployees;It’s worth to mention that the exact syntax and the concatenation operator might differ depending on the database management system you are using.
Also, it’s important to keep in mind that when you concatenating strings, the result depends on the type of the fields, if the fields are of different types, the database management system may try to cast them to the same type before concatenating them.
Example of String concat in Postgressql
In PostgreSQL, you can concatenate strings using the || operator or the CONCAT() function.
For example, to concatenate two columns first_name and last_name to get a full name, you could use either:
sqlCopy code
SELECTfirst_name ||' '||last_name asfull_name FROMtable_name;or
csharpCopy code
SELECT CONCAT(first_name, ' ', last_name) as full_name FROM table_name;Example of String Concat in SQL :
In SQL, you can concatenate strings using the || operator or the CONCAT() function.
For example, to concatenate two columns first_name and last_name to get a full name, you could use either:
SELECT first_name || ' ' || last_name as full_name FROM table_name;OR
SELECT CONCAT(first_name, ' ', last_name) as full_name FROM table_name;Example of String Concat in MSSQL.
In Microsoft SQL Server (MSSQL), you can concatenate strings using the + operator or the CONCAT() function.
For example, to concatenate two columns first_name and last_name to get a full name, you could use either:
SELECT first_name + ' ' + last_name as full_name FROM table_name;Or
SELECT CONCAT(first_name, ' ', last_name) as full_name FROM table_name;Example of String Concat in MYSQL.
In MySQL, you can concatenate strings using the CONCAT() function or the CONCAT_WS() function.
For example, to concatenate two columns first_name and last_name to get a full name, you could use either:
SELECT CONCAT(first_name, ' ', last_name) as full_name FROM table_name;OR
SELECT CONCAT_WS(' ', first_name, last_name) as full_name FROM table_name;Example of String Concact in Oracle :
In Oracle, you can concatenate strings using the || operator or the CONCAT() function.
For example, to concatenate two columns first_name and last_name to get a full name, you could use either:
in sql
SELECTfirst_name ||' '||last_name asfull_name FROMtable_name;Or
in csharp
SELECT CONCAT(first_name, ' ', last_name) as full_name FROM table_name;
Scroll Unlock 