How would you go about increasing the buffer cache hit ratio? 0. Explain the difference between a hot backup and a cold backup and the benefits associated with each 1. You have just had to restore from backup and do not have any control files. How would you go about bringing up this database? 2. How do you switch from an init.ora file to a spfile? 3. Explain the difference between a data block, an extent and a segment. 4. Give two examples of how you might determine the structure of the table DEPT. 5. Where would you look for errors from the database engine? 6. Compare and contrast TRUNCATE and DELETE for a table. 7. Give the reasoning behind using an index. 8. Give the two types of tables involved in producing a star schema and the type of data they hold. 9. What type of index should you use on a fact table? 10. Give two examples of referential integrity constraints. 11. A table is classified as a parent table and you want to drop and re-create it. How would you do this without affecting the children tables? 12. Explain the difference between ARCHIVELOG mode and NOARCHIVELOG mode and the benefits and disadvantages to each. 13. What command would you use to create a backup control file? 14. Give the stages of instance startup to a usable state where normal users may access it. 15. What column differentiates the V$ views to the GV$ views and how? 16. How would you go about generating an EXPLAIN plan?

2 Answers  

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one of the column in my table contains the data like SAL ---- 1000 1000 2000 3000 3000 So my requirement is i want output like SAL --- 1000 2000 3000 it mean i want to delete duplicate rows in the table permanently and i want output in the above formatow should u write query?

13 Answers   Cap Gemini, TCS,

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What are the different types of sql commands?

0 Answers  

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Types of optimization?

6 Answers   Microsoft,

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what is cursor procedure

1 Answers   iGate,

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What are sql functions? Describe in brief different types of sql functions?

0 Answers  

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explain access control lists. : Sql dba

0 Answers  

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write a query find which rows of a table is updated on 2 days before?

3 Answers   TCS,

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Are sql database names case sensitive?

0 Answers  

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State few characteristics of pl/sql?

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Why should I use postgresql?

0 Answers  

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What is a boolean in sql?

0 Answers  

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