Useful tips for everyday
What is the CRUD technique used for? In computer programming, create, read, update, and delete (CRUD) are the four basic operations of persistent storage. CRUD…
Is auto increment necessary for primary key? To have an auto-increment PK makes it easy to create a key that never needs to change, which…
How can delete lock in Oracle? Remove Oracle table row lock select. session_id. from. dba_dml_locks. where. name = ‘EMP’; SID. ___ 607. select. sid, serial#…
How do you replace a specific part of a string in Java? Java String replace() Method Example 3 public class ReplaceExample3 { public static void…
What is a primary key violation? Reasons of SQL Server Violation of Primary Key Constraint Error Code. The error “violation of primary key constraint cannot…
How do I restore a SQL database to a different location? Connect to the appropriate instance of the SQL Server Database Engine, and then in…
What is a maximum number of columns that can be used by a single table index? Currently, you can have no more than 16 key…
How do you measure time in SQL query? One simplistic approach to measuring the “elapsed time” between events is to just grab the current date…
What is the basic structure of a database? A database table consists of rows and columns. In database terminology, each row is called a record,…
Is SSMA for Oracle Free? SQL Server Migration Assistant (SSMA) is a free supported tool from Microsoft that simplifies database migration process from Oracle to…