HANA table field length issues

Hi Experts

I'm trying to create a table (*.hdbtable)

table.schemaName = "NEO_EZPCFVLMDTZUPGEXXXX";

table.tableType = COLUMNSTORE; // ROWSTORE is an alternative value

table.columns =

[

    {name = "id";  sqlType = NVARCHAR; nullable = false;},

    {name = "firstName";  sqlType = NVARCHAR;},

    {name = "lastName";  sqlType = NVARCHAR;},

    {name = "headline";  sqlType = NVARCHAR;},

    {name = "industry";  sqlType = NVARCHAR;},

    {name = "numConnections";  sqlType = DECIMAL;},

    {name = "picURL";  sqlType = NVARCHAR;  },

    {name = "profileURL";  sqlType = NVARCHAR;}

 

 

 

];

table.primaryKey.pkcolumns = ["id"];

When i try to import data into it.It shows field length is 1 and cannot import any data into it.

I'm not giving the field length cause the field lengths are dynamic each time.

I also want to know what is the diffrence between *.hdbtable creation and table creation directly under Systems Tab.