Specifies whether the column can accept NULL values. Columns that do not allow NULL values can be added only if they have a default specified. If the new column allows NULL values and no default is ...

Captures the cryptographically protected history of operations on columns of ledger tables: adding, renaming, and dropping columns. For more information on database ledger, see Ledger Column name Data ...

If a column is already in the table, you can change the following column attributes using the MODIFY clause: length, informat, format, and label. The values in a table are either truncated or padded ...