![]() ![]() To do that, you need to change the Primar圜olumn decorator to a. The maximum row size for the used table type, not counting BLOBs, is 65535. Database can be one of the following values: mysql, mariadb, postgres, cockroachdb. Mysql> alter table foo modify str2 varchar(65353) ![]() For a complete reference of all the data. The data type specifies what type of data the column can hold. ALTER TABLE db-name.table-name CHANGE COLUMN column-name column-name DECIMAL (15,6) Share. ADD DateOfBirth date Notice that the new column, 'DateOfBirth', is of type date and is going to hold a date. Use the SQl Query for Change data type of Mysql Column. We use the following SQL statement: ALTER TABLE Persons. mysql> create table foo (str1 varchar(300), str2 varchar(300)) Now we want to add a column named 'DateOfBirth' in the 'Persons' table. I misread your original question, you want VARCHAR(65353), which MySQL can do, as long as that column size summed with the other columns in the table doesn't exceed 65535. Mysql> alter table foo modify str varchar(65536) mysql> create table foo (str varchar(300)) If you try to declare a column of VARCHAR(65536) then it's too large even if it's the only column in that table, so MySQL automatically converts it to a MEDIUMTEXT data type. ![]() If you try to change a column to be too large, making the total size of the row 65536 or greater, you may get an error. Re the MEDIUMTEXT thing: a MySQL row can be only 65535 bytes (not counting BLOB/TEXT columns). Miky D is correct, the MODIFY command can do this more concisely. Run these queries and they will output all of the subsequent queries necessary to convert your entire database to character encoding utf8mb4 and collations to the MySQL 8 default of utf8mb40900aici. Note that after you make this change, the data type of the column will be MEDIUMTEXT. Heres how to change all databases/tables/columns. You have to list the column name twice, even if you aren't changing its name. ALTER TABLE CHANGE COLUMN VARCHAR(65536) ![]()
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