Tag: databases

Quizzes (243) Questions (4862)

Questions Related to databases

Multiple choice technology databases

What is control file?

  1. It describe how to interpret the flat file and options to load the data.

  2. It describe the location and format of the data file.

  3. It describe the location of the Bad and Discard records file .

  4. It has the control to connect database
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A,B,C Correct answer
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Multiple choice technology databases

Pick the correct options about Control File

  1. The LOAD DATA statement is required at the beginning of the control file.

  2. The INFILE option specifies where the input file is located

  3. Specifying BADFILE, then bad records found during loading will be stored in this file.

  4. Specifying DISCARDFILE , then records which do not meet a WHEN condition will be written to this file.

  5. Field Seperator - how the fields are separated in input file.
Reveal answer Fill a bubble to check yourself
A,B,C,D,E Correct answer
Full explanation
Multiple choice technology databases

Pick the correct options about Control File

  1. The LOAD DATA statement is required at the beginning of the control file.

  2. The INFILE option specifies where the input file is located

  3. Specifying BADFILE, then bad records found during loading will be stored in this file.

  4. Specifying DISCARDFILE , then records which do not meet a WHEN condition will be written to this file.

  5. Field Seperator - how the fields are separated in input file.
Reveal answer Fill a bubble to check yourself
A,B,C,D,E Correct answer
Multiple choice technology databases

Conventional path load (the default) uses the SQL INSERT statement and a bind array buffer to load data into database tables. When SQL*Loader performs a conventional path load, it wont competes equally with all other processes for buffer resources. This can slow the load significantly. Extra overhead is added as SQL statements are generated, passed to Oracle, and executed. Although appropriate during normal use, this can slow bulk loads dramatically.

  1. True

  2. False
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A Correct answer
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Multiple choice technology databases

In Direct Path Loading, Oracle will not use SQL INSERT statement for loading rows. It directly writes the rows, into fresh blocks beyond High Water Mark, in datafiles i.e. it does not scan for free blocks before high water mark. Direct Path load is very fast because Partial blocks are not used, so no reads are needed to find them, and fewer writes are performed. SQL*Loader need not execute any SQL INSERT statements; therefore, the processing load on the Oracle database is reduced. A direct path load calls on Oracle to lock tables and indexes at the start of the load and releases them when the load is finished. During a direct path load, processes perform their own write I/O, instead of using Oracle's buffer cache. This minimizes contention with other Oracle users.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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