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How can one create tables in Oracle?
If one is wanting to create a table in Oracle one must use the "Create Table" statement. These tables are partially defined by the columns contained and the information in the column. One must first decide the proper column type and then these data types are used in the Create Table statement. One must be somewhat familiar with Oracle in order to create these tables and additional information can be found on the DBA-Oracle website.
What does elements in a column of the periodic table have?
Elements in same column have same number of outermost electrons. It determines chemical properties.
How do you create a primay key in Oracle?
You can create a primary key column in an oracle table using the PRIMARY KEY keyword. Assuming you have an employee table that has employee information and has a column called emp_num. you can create a primary key in the table using the below command. ALTER TABLE tbl_employee_info add CONSTRAINT emp_pk PRIMARY KEY (emp_num) If you execute the above command in your database, emp_num will become the primary key of the table tbl_employee_info.
In a table what is a field?
In a table, a field is a column that contains specific information or data about one aspect of the entity being stored in the table. Each field represents a particular attribute or characteristic of the data being stored.
Information is stored in what type of object in a database?
table
What does each column in a database represent?
Each column in a database table represents an attribute reg. the data that is held in that table. For ex: Table Employee can contain employee number, name, age, date of joining etc. Each of these items would be stored as individual columns in the Employee table.
What does each column in database represent?
Each column in a database table represents an attribute reg. the data that is held in that table. For ex: Table Employee can contain employee number, name, age, date of joining etc. Each of these items would be stored as individual columns in the Employee table.
What is default table space in oracle?
DUAL table
What is space table in oracle?
Oracle table space is an identifier for a physical file found at the operating system level.
Oracle Alter a column's varchar length I want to change a varchar30 to a varchar20. can please help me get the syntax for it?
ALTER TABLE table_name MODIFY (column_name VARCHAR2(20));
Where are tables stored in oracle database?
In Oracle, tables are stored in segments, which are stored in extents, which are stored in tablespaces, which are stored in datafiles on the host system. This is a DBA issue. No application developer should concern themselves with this topic, except to identify data and query needs to the DBA.
How you remove a table in oracle?
via sql one can remove an oracle table (if one has the appropriate privileges) using the drop table tablenamesyntax,or, if one wishes to 'empty' a table, usetruncate table tablename
