How can we get parent and child record in single query using SQL?

How can we get parent and child record in single query using SQL?

“how to get parent and child record in single query using sql” Code Answer

1. SELECT child. Id,
2. child. Name,
3. child. ParentId,
4. parent. Name as ParentName.
5. FROM your_table child.
6. JOIN your_table parent ON child. ParentId = parent. id;

How do I get SQL child records?

Just remember that a table variable or a temporary table would need to be created within which ever session that you run the larger select statements.

1. — Parent Table.
2. DECLARE @tableName VARCHAR(150) = ‘Production.Product’
3. DECLARE @IDs TABLE (ids int)
4. INSERT @IDs (ids)
5. SELECT 316 UNION.
6. SELECT 317 UNION.
7. SELECT 318 UNION.

Which data model has parent child?

The hierarchical database model mandates that each child record has only one parent, whereas each parent record can have one or more child records. In order to retrieve data from a hierarchical database, the whole tree needs to be traversed starting from the root node.

How can we maintain parent/child relationship in database?

Parent-child relationship in MySQL has to deal with establishing some hierarchal dependencies between records in a database table. In MySQL terms, it means say that “row 12 is the parent of row 14” and stuff like that. In business terms, it will mean establishing a dependency relationship between two similar entities.

Which model is more flexible and easy?

“A data model is a way of finding the tools for both business and IT professionals, which uses a set of symbols and text to precisely explain a subset of real information to improve communication within the organization and thereby lead to a more flexible and stable application environment”.

How to retrieve data from lookup relationship object of child object?

From parent to child we can query with inner query with child relationship name . From child to parent we can query with dot notaion . Please check the below link . Let me know if it helps . as i mentioned above here am not worrying about Parent to child and Child to Parent relationship.

How to get parent objects based on ChildId?

For example, I need a query that lets me see the Parent objects where where the parent’s name is “John” and the child’s favorite color is blue. Hope that makes sense. The reason for the complication seems to be that children are in a list, not in a @onetoone relationship.

How to find all parents of a particular record?

For those who require to get only Query Part 1: Find only Parents of a particular record The following query is used to get the record and it’s all parent category records from the above tables. This query will produce a result as follows.

How to get parent and child in Java?

Without Fetch it will be List where object [0] = parent and object [1] = child. JPQL provides a special syntax that, in these cases, makes things easier and helps you to think in an Oriented Object way: