![]() ![]() ![]() Note that the first item has a total length of eight characters: five leading digits, a decimal place and two decimal digits. SELECT STR(item_cost,8,2) || ‘ ‘ || STR(item_quantity) FROM items The following example shows a SELECT that lists two numbers, the first being a dollar figure having five leading digits and two decimals, the second an integer: Convert string to int in MySQL Ask Question Asked 6 years, 1 month ago Modified 6 years, 1 month ago Viewed 6k times 0 I have a column with names like: Ernest Hemingway Jackson Pollock I want to convert them to numbers and store them in an INT field. CAST ( '195' AS int ) CONVERT ( int, '225' ) The string to int conversion can be useful where you are taking user input and want to convert that into column’s data type before using the INSERT or UPDATE query, apart from many other situations. Table 11. Both these functions are little different to use. The following table shows the required storage and range for each integer type. As an extension to the standard, MySQL also supports the integer types TINYINT, MEDIUMINT, and BIGINT. Though the STR function accommodates numbers with decimals, it works with integers just as well. MySQL supports the SQL standard integer types INTEGER (or INT) and SMALLINT. Microsoft’s SQL Server uses the plus symbol, “+”, for this. Standard SQL uses two vertical bar symbols, “||”, to concatenate, or combine, two or more character items together. A space between the item name and quantity separates the two items, making the combined field easier to read. This CONVERT example takes the value '' and converts it to. For example: mysql> SELECT CONVERT ('', DATE) Result: ''. Let's look at how to use the CONVERT function to convert a value to a DATE type. This SELECT statement lists a single field for each record. The first syntax for the MySQL CONVERT function allows you to convert a value from one datatype to another datatype. Use the optional M and D parameters to specify the maximum number of digits (M) and the number of digits following the decimal point (D). Format: 'YYYY-MM-DD HH:MM:SS' DECIMAL: Converts value to DECIMAL. Format: 'YYYY-MM-DD' DATETIME: Converts value to DATETIME. You only need to set the session timezone and all TIMESTAMP columns will be converted from/to your zone when you update/select them. In the following example, MySQL converts a string into an integer implicitly before doing calculation: SELECT (1 + '1')/ 2 Code language: SQL (Structured Query Language) (sql) Try It Out. Value Description DATE: Converts value to DATE. MySQL's TIMESTAMP type does that anyway (it uses standard Unix timestamps to store the time) and they are always in UTC timezone. SELECT item_name || ‘ ‘ || STR(item_quantity) FROM items You don't need to store the time in INT's. You can combine the two items into a single one: For example, a user may have INT 123456 stored in this column and I want to ensure that is accurately stored once converted to VARCHAR. This SQL statement lists an item’s name and quantity separately, each with its own heading. The information in the current INT field is sensitive and I want to ensure that I don't alter it inadvertently or destroy it while changing the table type. SELECT item_name, STR(item_quantity) FROM items The STR() function takes a number and turns it into characters, such as the following example shows: ![]()
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