How to extract JSON values from nvarchar column?
Your JSON is an array containing the two values idTest1 and idTest2. Your path $.idTest1 doesn’t work because the values exist inside the array entry. Look at the JSON output: [ {“idTest1″:111111,”idTest2”:222222}] — The square brackets are a dead giveaway!
How to update a column with JSON data in another table?
I want to update columns in one table by retrieving JSON values from another table. And lets pretend I have another table filled with rows of JSON like the following: Now the idea is to change Johns name to Jeff. The above SQL may make no sense but I’m just trying to get across my current logic of what I’m trying to do. I hope it makes some sense.
Why does JSON always return null when extracting?
I’m trying to extract the values, but the always return NULL. This looks to me to be an issue with your JSON not behaving as you expect. Your JSON is an array containing the two values idTest1 and idTest2.
Why does JSON output with a double quote?
The default json->text coercion outputs with a double quote ( “) because coercing from text to a json string requires you to double-quote your input. To get rid of the double-quotes, use TRIM Important point though, you lose some utility if you do that.
How are JSON results formatted in SQL Server?
The results are formatted as an array of JSON objects. The number of elements in the JSON array is equal to the number of rows in the results of the SELECT statement (before the FOR JSON clause is applied). Each row in the results of the SELECT statement (before the FOR JSON clause is applied) becomes a separate JSON object in the array.
Can a SELECT statement be formatted with for JSON?
To format the JSON output automatically based on the structure of the SELECT statement, use FOR JSON AUTO. Here’s an example of a SELECT statement with the FOR JSON clause and its output.
How does the for JSON clause work in SQL?
The FOR JSON clause uses the rules described in this topic to convert SQL data types to JSON types in the JSON output. The FOR JSON clause escapes special characters and represents control characters in the JSON output as described in this topic.