I am using a Postgres table to store HTML data. One of the columns is of type varchar, and this is where the HTML data is stored. My understanding is that this column datatype has no maximum length. I tried…
In contrast to CHAR, VARCHAR values are stored as a 1-byte or 2-byte length prefix plus data. The length prefix indicates the number of bytes in the value. A column uses one length byte if values require no more than…
I am trying to alter column named names type from text to VARCHAR with length L. Where L is the maximum length of the names. I am trying with inner/sub-query as follows: Is this even possible? Any alternative to do…
In my "merchants" table, column AXPID is of integer data type, Vendor is varchar(255) and StoreNum is varchar(20). at the mysql command line, I entered INSERT INTO merchants (AXPID, Vendor, Storenum) VALUES (3, Target, 1911); and got "ERROR 1054 (42S22):…
I have some data to store in MySQL. The data is guaranteed to be less than 1024 characters but would not be guaranteed to be less than 255 characters. There are two solutions. (1) Use a text column to store…
I'm working on a table with a column, 'Expiry Date', as a varchar with all data formatted as DD/MM/YYYY. The creator of the table has used the wrong type for this expiry date column and now the client needs to…
In my table I have an entire column that has varchar date, here is what it looks like: 2/1/2020 02:30:00 (date is m/d/yyyy) I want it to convert to standard MySQL date format (yyyy-mm-dd) or maybe if possible a customized…