What's Synonyms

PL/SQL Interview Questions and Answers

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What's Synonyms

Synonyms is the alias name for table, views, sequences & procedures and are created for reasons of Security and Convenience.
Two levels are Public - created by DBA & accessible to all the users. Private - Accessible to creator only. Advantages are referencing without specifying the owner and Flexibility to customize a more meaningful naming convention.

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Other Interview Questions

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• What's SQL*Plus
• What's NVL
• What's Date Functions
• What's Character Functions
• What's TTITLE & BTITLE
• What's COLUMN
• What's BREAK
• What's COMPUTE
• What's SET
• What's SPOOL
• What's JOIN
• What's Union
• What's Intersect
• What's Minus
• What's Correlated Subquery
• What's Multiple columns
• What's Sequences
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• What's Indexes
• What's Data types
• Order of SQL statement execution
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• What's Posting
• What's Rollback
• What's Savepoint
• Set Transaction
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• What's Consistency
• What's Integrity
• What's Deadlock
• What's Mutating Table
• What's SQL*Loader
• The most important DDL statements in SQL are:
• Operators used in SELECT statements.
• SELECT statements:
• The SELECT INTO Statement is most often used to create backup copies of tables or for archiving records.
• The INSERT INTO Statements:
• The Update Statement:
• The Delete Statements:
• Sort the Rows:
• The IN operator may be used if you know the exact value you want to return for at least one of the columns.
• BETWEEN ... AND
• What is the use of CASCADE CONSTRAINTS?
• Why does the following command give a compilation error?
• Which system tables contain information on privileges granted and privileges obtained?
• Which system table contains information on constraints on all the tables created?obtained?
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• What will be the output of the following query?
• What does the following query do?
• What is the advantage of specifying WITH GRANT OPTION in the GRANT command?
• Which command executes the contents of a specified file?
• What is the value of comm and sal after executing the following query if the initial value of ‘sal’ is 10000 UPDATE EMP SET SAL = SAL + 1000, COMM = SAL*0.1;?
• Which command displays the SQL command in the SQL buffer, and then executes it?
• What command is used to get back the privileges offered by the GRANT command?
• What will be the output of the following query?
• Which date function is used to find the difference between two dates?
• What operator performs pattern matching?
• What is the use of the DROP option in the ALTER TABLE command?
• What operator tests column for the absence of data?
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• What is the use of DESC in SQL?
• What command is used to create a table by copying the structure of another table?
• TRUNCATE TABLE EMP; DELETE FROM EMP; Will the outputs of the above two commands differ?
• What is the output of the following query SELECT TRUNC(1234.5678,-2) FROM DUAL;?
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• What is the parameter substitution symbol used with INSERT INTO command?
• What's an SQL injection?
• What is difference between TRUNCATE & DELETE
• What is a join? Explain the different types of joins?
• What is the sub-query?
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• Where the integrity constraints are stored in data dictionary?
• How will you activate/deactivate integrity constraints?
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• The command used to open a CURSOR FOR loop is
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• Read the following code:
• Read the following code:
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• Read the following code 2:
• When invoking this procedure, you encounter the error
• Read the following code 3
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• Examine this function:
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• Examine this code
• Which Oracle supplied package will enable this feature?
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• PL/SQL Questions:
• SQL/ SQLPlus