The create table wizard opens. on the keys page, select a primary key in the table and click change. the change primary key window opens. select the column or columns that you want to define as primary key columns. you can define up to 16 columns to be primary key columns. optional: type the constraint name of the primary key.. Keep in mind, however, that the data in your existing table may affect your ability to effectively change the primary key, such as any null values in a field. any fields you want to add to the primary key definition must be declared as "not null", so you may have to alter that column as well.. Changing the database name,dbid by using nid. (before the name change), then you should use the initialization parameter file and password file from before the database name change. changing the dbid and dbname of a database. primary key. pages. home; blog archive 2018 (2).
Db2 create table shopper.salesboys(sid int not null, name varchar(40) not null, salary double not null, constraint pk_boy_id primary key (sid)) foreign key a foreign key is a set of columns in a table which are required to match at least one primary key of a row in another table.. How to update a still referenced primary key in db2. ask question. up vote 1 down vote favorite. background: i am programming an application that uses java for db2 (v9.5 for unix) access. your original design is fine only if you don't ever want to change that name again. if you worry about long queries, then you can name your ids like this. I inherited a database application with a lot of primary keys created with sys name, such as sys_c002383. i want to change the name of primary key to the more meaningful one, such as dept_deptno_pk. what i did is: alter table dept drop primary key cascade; but by doing this, i also need to recreate all related foreign keys..
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