What is this data type? It's some input data from leetcode - sql
I'm doing some exercises of Databases from LeetCode. I want to test my codes on my laptop using MySQL. I hope to have a easy way to import data.
Here is the input data from LeetCode:\
{"headers":{"insurance":["PID","TIV_2015","TIV_2016","LAT","LON"]},"rows":
{"insurance":[[1,224.17,952.73,32.4,20.2],[2,224.17,900.66,52.4,32.7],
[3,824.61,645.13,72.4,45.2],[4,424.32,323.66,12.4,7.7],
[5,424.32,282.9,12.4,7.7],[6,625.05,243.53,52.5,32.8],
[7,424.32,968.94,72.5,45.3],[8,624.46,714.13,12.5,7.8],
[9,425.49,463.85,32.5,20.3],[10,624.46,776.85,12.4,7.7],
[11,624.46,692.71,72.5,45.3],[12,225.93,933,12.5,7.8],
[13,824.61,786.86,32.6,20.3],[14,824.61,935.34,52.6,32.8]]}}
What is the data type?
This is a JSON string. JSON is a common data interchange format.
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I am currently working on building a dataware house in snowflake for the business that i work for and i have encounter some problems. I used to apply the function Json_value in TSQL for extracting certain key/value pair from json format field inside my original MSSQL DB.
All the other field are in the regular SQL format but there is this one field that i really need that is formated in JSON and i can't seems to exact the key/value pair that i need.
I'm new to SnowSQL and i can't seems to find a way to extract this within a regular query. Does anyone knows a way around my problem ?
* ID /// TYPE /// Name (JSON_FORMAT)/// Amount *
1 5 {En: "lunch, fr: "diner"} 10.00
I would like to extract this line (for exemple) and be able to only retrieve the EN: "lunch" part from my JSON format field.
Thank you !
Almost any time you use JSON in Snowflake, it's advisable to use the VARIANT data type. You can use the parse_json function to convert a string into a variant with JSON.
select
parse_json('{En: "lunch", fr: "diner"}') as VARIANT_COLUMN,
VARIANT_COLUMN:En::string as ENGLISH_WORD;
In this sample, the first column converts your JSON into a variant named VARIANT_COLUMN. The second column uses the variant, extracting the "En" property and casting it to a string data type.
You can define columns as variant and store JSON natively. That's going to improve performance and allow parsing using dot notation in SQL.
For anyone else who also stumbles upon this question: You can also use JSON_EXTRACT_PATH_TEXT. Here is an example, if you wanted to create a new column called meal. select json_extract_path_text(Name,'En') as meal from ...
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