What are the file types available in SQL Loader?

Anurag Kehri.

• Anurag Kehri. Answered On : Dec 29th, 2005.
• There are 5 files are user in SQL Loader. they are. Data File. Control File. Log file. Bad File. Discard file. data file and control file are required file. exampleSQL> sqlldr userid=apps/apps control=XYZ. ctlThis control file contain the referance of data file.

What are indexes in Oracle?

An index is a database structure that provides quick lookup of data in a column or columns of a table. For example, a Flights table in a travelDB database has three indexes: An index on the orig_airport column (called OrigIndex) An index on the dest_airport column (called DestIndex)

What are different types of index in SQL?

There are two types of Indexes in SQL Server:

• Clustered Index.
• Non-Clustered Index.

What is the type of index?

There are primarily three methods of indexing: Clustered Indexing. Non-Clustered or Secondary Indexing. Multilevel Indexing.

What are the types of index in SQL?

What are types of index?

Expression-based indexes efficiently evaluate queries with the indexed expression.

• Unique and non-unique indexes.
• Clustered and non-clustered indexes.
• Partitioned and nonpartitioned indexes.
• Bidirectional indexes.
• Expression-based indexes.

How many types of index are there?

Two main types of indexing methods are 1)Primary Indexing 2) Secondary Indexing. Primary Index is an ordered file which is fixed length size with two fields. The primary Indexing is also further divided into two types 1)Dense Index 2)Sparse Index.

What is the difference between checkpoint and SCN?

Checkpoint is the concept/background process while SCN is like serial number in our table.. the system change number (SCN) is Oracle’s clock – every time we commit, the clock increments. The SCN just marks a consistent point in time in the database.

What is discard file in SQL Loader?

DISCARD file is to store the records that are neither inserted into table nor rejected as bad. This is an optional parameter with SQL Loader and by default name would be . dsc.

What are the different types of indexes available in Oracle Database?

But first, let’s delve into the different types of indexes available in Oracle Database. Oracle 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. By default indexes are B-tree. These are balanced.

What are the different types of SQL loader data types?

SQL*Loader Data Types. SQL*Loader data types can be grouped into portable and nonportable data types. Within each of these two groups, the data types are subgrouped into value data types and length-value data types. Portable versus nonportable refers to whether the data type is platform dependent.

What are indexes in SQL Server?

Indexes are logically and physically independent of the data in the associate table. Indexes are optional structures associated with tables and clusters. You can create indexes on one or more columns of a table to speed SQL statement execution on that table. Indexes are the primary means of reducing disk I/O when properly used.

What is lob type in SQL loader?

A LOB is a large object type. This release of SQL*Loader supports loading of four LOB types: BFILE: a BLOB stored outside of the database tablespaces in a server-side operating system file LOBs can be column datatypes, and with the exception of the NCLOB, they can be an object’s attribute datatypes.