Overview
The JSON_merge() function merges two JSON-formatted strings into a new JSON-formatted string and returns the result. When there are conflicting keys between the two input strings, the values from the second string take precedence in the merged output.
Syntax
JSON_merge(str_1, str_2)
| Argument | Type | Description |
|---|---|---|
str_1 |
String | The first JSON-formatted string |
str_2 |
String | The second JSON-formatted string |
Return type: String
Example of Result
return JSON_merge('{"name":"Lisa","age":23}','{"name":"Lisa","age":30,"interest":"football"}')
Result: {"age":30,"interest":"football","name":"Lisa"}
It's advisable to use distinct quotation marks (
"or') within JSON objects and to encapsulate the two input strings. The pairing of these quotation marks is essential for the correct parsing of the statement.
Example of Use
Consolidate information from different sources into a single JSON object, preserving unique keys and their corresponding values.
with '{
"name": "John Doe",
"age": 30,
"city": "New York"
}' as s1
with '{
"name": "John Doe",
"age": 29,
"email": "[email protected]"
}' as s2
return JSON_merge(s1, s2)
Result: {"age":29,"city":"New York","email":"[email protected]","name":"John Doe"}