Hi,I need to set the data type for columns c3,c4 as "C" without
inserting single record in tablesuppose, tab is table having c3,c4 is
list columntab:([] c1:`int$(); c2:`boolean$(); c3:(); c4:())q)meta tab c
| t f a --| -----c1| i c2| b c3| c4| I want...