mysql full backup all databases

To do a good BD restore without any problem with character sets use these commands (you can change the default-character-set as you need).

NULL is a special value in SQL. So to null a property, do this: The MySQL manual states that if the column does not allow NULL values, setting it to NULL will result in the default value for the data type (e.g. an empty string). 

Assuming you mean that the database type is decimal(6, 2), then this means that your column is set up to store 6 places (scale), with 2 to the right of the decimal (precision). You should treat this as a decimal CLR type. A sample would be 1234.56 . The syntax for the double data type is DOUBLE […]