oracle db
/* Create Table */
CREATE TABLE ex2_1(
column1 char(10),
column2 VARCHAR2(10),
column3 NVARCHAR2(10),
column4 NUMBER
);
/*
# Max size of table_name, column_name is 30 bytes
# table_name, column_name cannot be identified by keywords
# table_name, column_name can be identified with alphanumeric, '_' '$' '#' except first character
# First character must be a alphabet
# Max amount of columns in a table is 255
*/
On-orbit