How do I change the default value of a column in Oracle?

How do I change the default value of a column in Oracle?

ALTER TABLE customers MODIFY city varchar2(75) DEFAULT ‘Seattle’ NOT NULL; In this example, the ALTER TABLE statement would modify the column called city to be a data type of varchar2(75), the default value would be set to ‘Seattle’ and the column would be set to not allow null values.

What alter tables modify?

ALTER TABLE changes the structure of a table. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can also change characteristics such as the storage engine used for the table or the table comment.

How do I change the default tablespace in Oracle?

To set the default permanent tablespace in Oracle, you can run the following ALTER DATABASE statement: ALTER DATABASE DEFAULT TABLESPACE tbs_perm_01; This will update the default permanent tablespace to use the tbs_perm_01 tablespace.

How do I find the default space in a table?

To find the default permanent tablespace in Oracle, you can run the following SELECT statement: SELECT PROPERTY_VALUE FROM DATABASE_PROPERTIES WHERE PROPERTY_NAME = ‘DEFAULT_PERMANENT_TABLESPACE’; This will query the Oracle system tables and return the value of the default permanent tablespace.

What is a default tablespace?

Default tablespace are the oracle tablespace where the objects like Oracle table, oracle index are created by the user when no tablespace name is specified in the object creation clause. We can define both the Permanent and temporary tablespace for the users.

How do I change the default value in SQL?

Use SSMS to specify a default

1. In Object Explorer, right-click the table with columns for which you want to change the scale and click Design.
2. Select the column for which you want to specify a default value.
3. In the Column Properties tab, enter the new default value in the Default Value or Binding property.