Reduced Administrative Burden – Oracle Certification

By -Porshica Hibbler

Table Partitioning Schemes-Partitioning

Posted on 20/06/2024
Posted in Certifications of Oracle, Data Warehouse Systems, Extended Datatypes, Internal LOBs, INTERVAL DAY TO SECOND, Reduced Administrative Burden

There are currently nine methods by which you can partition tables in Oracle: •\ Range partitioning: You may specify ranges of data that should be stored together. For example, everything that has a timestamp within the month of Jan-2014 will be stored in partition 1, everything with a timestamp within Feb-2014 in partition 2, and

By -Porshica Hibbler

Partitioning Overview-Partitioning

Posted on 02/02/2024
Posted in Certifications of Oracle, Reduced Administrative Burden

Partitioning facilitates the management of very large tables and indexes using divide and conquer logic. Partitioning introduces the concept of a partition key that is used to segregate data based on a certain range value, a list of specific values, or the value of a hash function. If I were to put the benefits of

By -Porshica Hibbler

CHUNK Clause-Datatypes

Posted on 08/10/2023
Posted in Certifications of Oracle, Data Warehouse Systems, Reduced Administrative Burden

LOBs are stored in chunks; the index that points to the LOB data points to individual chunks of data. Chunks are logically contiguous sets of blocks and are the smallest unit of allocation for LOBs, whereas normally a block is the smallest unit of allocation.The CHUNK size must be an integer multiple of your Oracle

By -Porshica Hibbler

LOB Tablespace-Datatypes

Posted on 01/09/2023
Posted in Certifications of Oracle, Data Warehouse Systems, Extended Datatypes, Reduced Administrative Burden

The CREATE TABLE statement returned from DBMS_METADATA for both the SecureFiles and BasicFiles included the following:LOB (“TXT”) STORE AS … ( TABLESPACE “USERS” … The TABLESPACE specified here is the tablespace where the LOBSEGMENT and LOBINDEX will be stored, and this may be different from the tablespace where the table itself resides. That is, the

By -Porshica Hibbler

TIMESTAMP WITH TIME ZONE Type-Datatypes

Posted on 28/07/2023
Posted in Certifications of Oracle, Data Warehouse Systems, Extended Datatypes, Internal LOBs, Reduced Administrative Burden

The TIMESTAMP WITH TIME ZONE type inherits all of the qualities of the TIMESTAMP type and adds time zone support.The TIMESTAMP WITH TIME ZONE type consumes 13 bytes of storage, with the extra 2 bytes being used to preserve the time zone information. It differs from a TIMESTAMP structurally only by the addition of these

By -Porshica Hibbler

TIMESTAMP WITH LOCAL TIME ZONE Type-Datatypes

Posted on 15/06/2023
Posted in Certifications of Oracle, INTERVAL DAY TO SECOND, Reduced Administrative Burden

This type works much like the TIMESTAMP column. It is a 7- or 11-byte field (depending on the precision of the TIMESTAMP), but it is normalized to be stored with the local database’s time zone. To see this, we’ll use the DUMP command once again. First, we create a table with three columns—a DATE, a

By -Porshica Hibbler

INTERVAL DAY TO SECOND-Datatypes

Posted on 08/05/2023
Posted in Certifications of Oracle, Internal LOBs, Reduced Administrative Burden

The syntax for the INTERVAL DAY TO SECOND type is straightforward:INTERVAL DAY(n) TO SECOND(m) where N is an optional number of digits to support for the day component and varies from zero to nine, with a default of two. M is the number of digits to preserve in the fractional part of the seconds field

By -Porshica Hibbler

Creating a BasicFiles LOB-Datatypes

Posted on 18/04/2023
Posted in Certifications of Oracle, Extended Datatypes, Reduced Administrative Burden

In 12c and above, to create a BasicFiles LOB, you’ll need to use the STORE AS BASICFILE syntax: SQL> create table t( id int primary key,txt clob)segment creation immediatelob(txt) store as basicfile;Table created. Using the DBMS_METADATA package, we can see the details of a BasicFiles LOB:SQL> select dbms_metadata.get_ddl( ‘TABLE’, ‘T’ ) from dual;DBMS_METADATA.GET_DDL(‘TABLE’,’T’) CREATE TABLE

By -Porshica Hibbler

IN ROW Clause-Datatypes

Posted on 15/03/2023
Posted in Certifications of Oracle, Data Warehouse Systems, Reduced Administrative Burden

The CREATE TABLE statement returned from DBMS_METADATA earlier for both theSecureFiles and BasicFiles included the following:LOB (“TXT”) STORE AS … (… ENABLE STORAGE IN ROW … This controls whether the LOB data is always stored separate from the table in the LOBSEGMENT or if it can sometimes be stored right in the table itself without

By -Porshica Hibbler

Read Consistency for LOBs-Datatypes

Posted on 06/02/2023
Posted in Certifications of Oracle, Internal LOBs, INTERVAL DAY TO SECOND, Reduced Administrative Burden

In previous chapters, we’ve discussed read consistency, multiversioning, and the role that undo plays in that. Well, when it comes to LOBs, the way read consistency is implemented changes. The LOBSEGMENT does not use undo to record its changes; rather, it versions the information directly in the LOBSEGMENT itself. The LOBINDEX generates undo just as