I’ve always appreciated the CREATE OR REPLACE functionality in Oracle for views, packages and triggers, and I’ve often wanted a similar CREATE OR REPLACE TABLE. Many times, I’ll find myself needing to quickly drop and re-create a table while I’m designing it. This is tedious, becaus...
create table toys_clone as select * from toys;Easy, right?Yes. But, as always, there's more to it than this. You'll want to add some constraints to your table. And there are many types of table available in Oracle Database, including:Table...
MySqlConnection cannot be cast to [B]MySQL.Data.MySqlClient.MySqlConnection. [C#] How to make the Console Process delay [C#] Oracle.DataAccess issue - Unhandled exception of type System.TypeInitializationException occured in mscorlib.dll [C#] Regex - Best Validation of Domain? [C#] Upload ...
, then rows cannot be inserted into or updated in the base table using the view. The constraint created by WITH CHECK OPTION of the ACCOUNTS_STAFF view only allows rows that have a department number of 10 to be inserted into, or updated in, the EMP table. Alternatively, assume that the...
Before Oracle 12c, we don’t have a direct method of generating an AUTO_INCREMENT column in a table. We need to use the combination of Sequences and Triggers. Now, we have two different ways to implement it. Using IDENTITY column
The SQL SELECT statement is used to select data from a database. When you use the SELECT query to obtain data, your results will be stored in a “result table.” This table of results is called the “result set.” Let’s say you have a table of information called “Customers,” disp...
ALTER TABLE t1 ADD c1 INT DEFAULT 1 NOT NULL PRIMARY KEY; Run the statement in Toad for Oracle, and the outputTable alteredshown in Figure 1 indicates that the new column was added. Figure 1. Table altered to add a new column
Our aim is to make a similar kind of function. N.B.~If someone ask me since we already have buit-in function for achieving the result then why we need to build our own? Well it is for our demonstration purpose Now let us look into the practical aspect of doing so ...
Below are the steps to drop and recreate temp tablespace in Oracle. You can also assign default temporary tablespace to the newly created tablespace.
But first, let’s delve into the different types of indexes available in Oracle Database.How to Choose the Index TypeOracle Database offers many different types of index to improve your SQL. One of the key decisions you need to make is whether to go with a bitmap or B-tree index....