What is chunking in Oracle?
A chunk is one or more Oracle blocks. You can specify the chunk size for the LOB when creating the table that contains the LOB. This corresponds to the data size used by Oracle Database when accessing or modifying the LOB value. In PL/SQL use DBMS_LOB. GETCHUNKSIZE .
What is the use of Dbms_lob?
The DBMS_LOB package provides subprograms to operate on BLOBs, CLOBs, and NCLOBs. You can use DBMS_LOB to access and manipulate specific parts of LOBs or complete LOBs. You can also refer to “Large objects (LOBs)” in Oracle TimesTen In-Memory Database PL/SQL Developer’s Guide.
Is PL SQL and Oracle are same?
PL/SQL is Oracle’s procedural language extension to SQL. PL/SQL allows you to mix SQL statements with procedural constructs.
What is Dbms_lob Substr in Oracle?
When calling DBMS_LOB . SUBSTR from the client (for example, in a BEGIN / END block from within SQL*Plus), the returned buffer contains data in the client’s character set. Oracle converts the LOB value from the server’s character set to the client’s character set before it returns the buffer to the user.
What is the maximum size of LOB?
What Are Large Objects? Large Objects (LOBs) are a set of datatypes that are designed to hold large amounts of data. A LOB can hold up to a maximum size ranging from 8 terabytes to 128 terabytes depending on how your database is configured.
What is Plsql used for?
PL/SQL lets you use all SQL data manipulation, cursor control, and transaction control statements, and all SQL functions, operators, and pseudocolumns. PL/SQL fully supports SQL data types. You need not convert between PL/SQL and SQL data types.
Is PL SQL better than SQL?
PL/SQL stands for “Procedural language extensions to SQL.” PL/SQL is a database-oriented programming language that extends SQL with procedural capabilities….Comparisons of SQL and PLSQL:
| SQL | PLSQL |
|---|---|
| SQL is declarative language. | PLSQL is procedural language. |
| SQL can be embedded in PLSQL. | PLSQL can’t be embedded in SQL. |
How do I run a parallel query in Oracle?
To execute a query in parallel, Oracle Database generally creates a set of producer parallel execution servers and a set of consumer parallel execution servers. The producer server retrieves rows from tables and the consumer server performs operations such as join, sort, DML, and DDL on these rows.
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