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Sometimes we need to remove special characters from string or columns value. Suppose, we developed an ETL tool that inserting records on ...
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$cond operator has the keyword "if", "then" and "else", using this operator we can perform if/else in ...
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We can use $add an operator to add days in ISODate in MongoDB, $add is the Arithmetic Aggregation Operator, which adds number and date in ...
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There are several ways to check the table exist in the particular schema , some solutions are described below. First, I'll create...
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This issue comes much time when we are using PostgreSQL with Node.js, Error: Cannot find module 'bcrypt' in nodejs application, and...
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Problem: DBA work is critical and sensitive; we work on Non Relational or Relational Database and the data consistency is a common facto...
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Problem: Suppose we have a source directory where more than one tab-delimited files exist, and we need to move files in archive folder ... -
Many times we come across the scenario where we need to some code based on whether an index exists or not. The following query may he...
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If you are a DBA and you are working on a data-dictionary for a project so that you can keep track of schema changes and so on, then this ... -
A primary key constraint is a combination of a NOT NULL constraint and a UNIQUE constraint. This constraint ensures that the specific colu...
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