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DDL (Data Definition Language) Commands in MySQL 0

DDL (Data Definition Language) Commands in MySQL

DDL statements or commands are used to define and modify the database structure of your tables or schema. When you execute a DDL statement, it...

PostgresSQL Interview Questions & Answers 0

PostgresSQL Interview Questions & Answers

Q: – What Is A Sequence? A sequence is a special kind of database object designed for generating unique numeric identifiers. It is typically used...

Mongodb  Interview Questions & Answers part 2 0

Mongodb Interview Questions & Answers part 2

Q: – How long does replica set fail over take? It may take 10-30 seconds for the primary to be declared down by the other...

Mongodb  Interview Questions & Answers part 1 0

Mongodb Interview Questions & Answers part 1

Q: – What makes Mongodb best? Document-oriented High performance High availability Easy scalability Rich query language Q: – If I am using replication, can some...

SQL server Interview Questions & Answers 0

SQL server Interview Questions & Answers

Q: – Can you explain about buffer cash and log Cache in sql server? Buffer Cache: Buffer cache is a memory pool in which data...

Sybase Interview Questions & Answers part 2 0

Sybase Interview Questions & Answers part 2

Q: – What is ASA in Sybase? ASA is a fully featured DBMS with transactional integrity, automatic rollback and recovery, declarative RI, triggers and stored...

Sybase Interview Questions & Answers part 1 0

Sybase Interview Questions & Answers part 1

Q: – What is the difference of a LEFT JOIN and an INNER JOIN statement? A LEFT JOIN will take ALL values from the first...

Oracle Interview Questions & Answers part 2 0

Oracle Interview Questions & Answers part 2

Q: – What is the maximum number of triggers, can apply to a single table? 12 triggers Q: – What are the components of physical...

Oracle Interview Questions & Answers part 1 0

Oracle Interview Questions & Answers part 1

Q: – What is "SCN" ? The System Change Number (SCN) is an important quantifier that the Oracle database uses to keep track of its...

MySQL Interview Questions & Answers part 3 0

MySQL Interview Questions & Answers part 3

Q: – Explain "CHECK TABLE" statement? The CHECK TABLE statement performs an integrity check on table structure and contents. It works for MyISAM and InnoDB...

MySQL Interview Questions & Answers part 2 0

MySQL Interview Questions & Answers part 2

Q: – Explain the terms "mysqlimport", "mysqldump", "mysqladmin" and "mysqlcheck"? mysqlimport for importing data files, mysqldump for making backups, mysqladmin for server administration, and mysqlcheck...

MySQL Interview Questions & Answers part 1 0

MySQL Interview Questions & Answers part 1

Q: – What is REPLCAE statement, and how do I use it? The REPLACE statement is the same as using an INSERT INTO command. The...