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11 mar 2013 · Try this query. ALTER TABLE `table_name` CHANGE `From Date` `From Date` DATETIME NULL DEFAULT '0000-00-00 00:00:00';
29 sie 2017 · Learn how to use the CONVERT () function to convert a value to a specific datatype or character set in MySQL. See examples of converting values to DATE, DATETIME, TIME, CHAR, NCHAR, SIGNED, UNSIGNED, BINARY and more.
29 mar 2019 · CREATE TABLE temp (startdate varchar(255), stuff varchar(255)); INSERT INTO temp SELECT startdate,stuff FROM mytable; TRUNCATE TABLE mytable; ALTER TABLE mytable ALTER COLUMN startdate DATETIME NOT NULL; INSERT INTO mytable SELECT CAST(startdate AS DATETIME), stuff FROM temp; DROP TABLE temp;
24 gru 2016 · I would add a new column for the date (ALTER TABLE .. ADD COLUMN ..); UPDATE to set the new column. Then manually fix any really messed up values. Finally DROP COLUMN and RENAME COLUMN; ORDER BY a VARCHAR that contains a date in it may lead wrong answers. (Jan and Nov may get confused.)
You can use date_format() to convert varchar to date. The syntax is as follows − SELECT DATE_FORMAT(STR_TO_DATE(yourColumnName, 'yourFormatSpecifier'), 'yourDateFormatSpecifier') as anyVariableName from yourTableName;
The CAST() function allows you to convert a value of one type into another type. The syntax of the MySQL CAST() function is as follows: CAST(expression AS TYPE); Code language: SQL (Structured Query Language) (sql) The target type can be any one of the following types: BINARY, CHAR, DATE, DATETIME, TIME, DECIMAL, SIGNED, or UNSIGNED.
Here is the query to convert from varchar to datetime and compare − mysql> select * from DemoTable1565 where str_to_date(ArrivalDatetime,'%m/%d/%Y')=curdate(); This will produce the following output −
