Mssql Interview QuestionsDownload Mssql Interview Questions PDF
Mssql Interview Questions
ROLLBACK – Every statement between BEGIN and ROLLBACK are revealed to the state when the ROLLBACK is executed.
- Case sensitive
- Case insensitive.
Recursive stored procedure – It is defined as a process of resolving a problem where the solution occurs repetitively.This can be nested up to 32 levels.
SQL injection – SQL injection is an attack by malicious users in which the malicious code is inserted into the strings that are passed to an instance of SQL server for parsing and execution.
All the statements have to be checked for the vulnerabilities as they execute all syntactically valid queries received.The parameters can also be changed by the experienced and skilled attackers.
DDL (Data Definition Language)
DCL (Data Control Language)
TCL (Transactional Control Language)
- Save Transaction
It is similar to that of JOIN command.
UNION ALL – It is similar to that of UNION command, but it selects all the values.
It does not remove the values from the table but will retrieve the data.
- A subquery in the main query that has to be placed on the right-hand side of the comparison operator
- A subquery has to be placed parenthesis, in order to get executed first before the main query.
- It cannot have any order by clause.
- More than one subquery can be included in the main query.
- Filtering input parameters
- Use parameter collection with Dynamic SQL
- Use Parameters for Stored procedures
- In like clause, use escape characters
Global temporary table – These tables are visible to all users and are deleted when the connection is closed.
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