I've created a table named 'student' as : create table student( stud_id number primary key, stud_name varchar2(30) not null, branch_id varchar2(4) references branch(branch_id), course_id ...
I provide a database system to a number of customers. The database is installed locally on Oracle. We periodically upgrade the database structure (either adding new fields, renaming old fields, ...
I want to make an ALTER TABLE expression which adds a new column and sets a default value and additionaly defines the allowed values for that column. It's a text column, and allowed should be only ...
Lets say I have two columns of type NUMBER (without precision, and scale) and VARCHAR(300). I saw that these columns are way too large for my data, so I want to modify them to NUMBER(11) and ...
I am trying to resize a varchar2 column, when I get an ORA-14265 error: ORA-14265: data type or length of a table subpartitioning column may not be changed With Oracle providing the unhelpful: ...
In Oracle (and probably elsewhere), executing an ALTER TABLE statement will do an implicit commit on the current transaction. We have a tool (written in Java) that should modify a schema by: adding ...