![]() ![]() SELECT CAST(`column_name` AS SIGNED) FROM table_name GROUP BY CAST(`column_name` AS SIGNED) ASC Īlso with an alias. Convert String Number Into A Float Number Using the CONVERT () function, you can also convert the data between different character sets Following is the standard SQL syntax to convert the expression into a specific character set. You can use CAST as SIGNED for a GROUP BY operations. SELECT CAST(`column_name` AS SIGNED) some_alias FROM table_name ORDER BY some_alias ASC Use CAST as SIGNED for GROUP BY SELECT CAST(`column_name` AS SIGNED) FROM table_name ORDER BY CAST(`column_name` AS SIGNED) ASC Īlso with an alias. SELECT CAST(`column_name ` AS SIGNED) FROM table_name WHERE CAST(`column_name` AS SIGNED) > 100 Use CAST as SIGNED for ORDER BYĬAST as SIGNED can be used for ORDER BY. This CAST as SIGNED can also be used in a WHERE clause. Let’s take a look at some usage other than selecting a value. But this can also be used in other places. This is the nls language used to convert string1 to a number. This is the format that will be used to convert string1 to a number. In this tutorial, you have learned how to use the MySQL CAST() function to convert a value with any type into a value with a specified type.So this CAST as SIGNED can be used for the SELECT statement to get data, as we have already seen. TONUMBER( string1, formatmask, nlslanguage ) Parameters or Arguments string1 The string that will be converted to a number. The following statement converts DOUBLE values into CHAR values and uses the results as the arguments of the CONCAT function: SELECT productName,įROM products Code language: SQL (Structured Query Language) ( sql ) Try It Out +-+-+ģ rows in set (0.03 sec) Code language: JavaScript ( javascript ) RequiredDate BETWEEN CAST( '' AS DATETIME)ĪND CAST( '' AS DATETIME) Code language: SQL (Structured Query Language) ( sql ) To ensure safety, you can use the CAST() function to explicitly convert a string into a TIMESTAMP value, as follows: SELECT RequiredDate BETWEEN '' AND '' Code language: SQL (Structured Query Language) ( sql )īecause the data type of the requireDate column is DATE, MySQL has to convert the literal strings: '' and '' into TIMESTAMP values before evaluating the WHERE condition. The following query retrieves the orders whose required dates are in January 2003: SELECT This function takes two arguments: the string to be converted, and the data type to convert it to. ![]() Let’s take a look at the orders table in the sample database: The most common way to convert a string to a numeric value is to use the CAST() function. ![]() +-+ġ row in set ( 0.00 sec) Code language: PHP ( php ) 2) Using MySQL CAST function with table data examples | CONCAT( 'MySQL CAST example #',CAST( 2 AS CHAR)) | The following statement explicitly converts an integer into a string and concatenates the string with another string: SELECT CONCAT( 'MySQL CAST example #', CAST( 2 AS CHAR)) Code language: SQL (Structured Query Language) ( sql ) To explicitly convert a string into an integer, you use the CAST() function as the following statement: SELECT ( 1 + CAST( '1' AS UNSIGNED))/ 2 Code language: SQL (Structured Query Language) ( sql ) In the following example, MySQL converts a string into an integer implicitly before doing a calculation: SELECT ( 1 + '1')/ 2 Code language: SQL (Structured Query Language) ( sql )ġ row in set (0.01 sec) Code language: JavaScript ( javascript ) ![]() Let’s take a look at some examples of using the CAST() function. In practice, you often use the CAST() function to return a value with a specified type for comparison in the WHERE, JOIN, and HAVING clauses. The target type can be any one of the following types: BINARY, CHAR, DATE, DATETIME, TIME, DECIMAL, SIGNED, or UNSIGNED. The syntax of the MySQL CAST() function is as follows: CAST(expression AS TYPE) Code language: SQL (Structured Query Language) ( sql ) The CAST() function allows you to convert a value of one type into another type. Summary: in this tutorial, you will learn how to use MySQL CAST function to convert a value of a type into another type. ![]()
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