Many time we want run query with in query to get desirable result. MongoDB provide a aggregation operator to achieve result like this. Lets assume we have a collection with…
If we want SQL like "Like" operator in Mongo DB for string matching. But in mongo DB there is no such "like" operator instead it has regular expression to achieve…
The ternary operator is very useful for a single condition. But support ternary operator different way, not like other programming languages (?:). Syntax: A if C else B This first…
Many times we want to get a single file from svn repo but we do not want to checkout the complete repository. With the help of svn checkout we can…
There are various way to get year and month from date in PostgreSQL. 1. Extract The extract function retrieves subfields such as year or hour from date/time values. source must be a value expression…
Loopback does not support group by or distinct query. But we can achieve in loopback another way. Let see a solution for this issue. 1. Distinct // Let User is…
1. Open chrome and click chrome menu 2. Now scroll page till end and click on Advance 3. After clicking on advance page will expand and click on 'open your…
In our code object can empty or not. So we need to check object is empty or not. There are several way to check object in valid or not. Let…
