如何从具有部分 Json 数组值和剩余字符串值的 mysql 表的列中提取值

Question

Names of these 3 columns were Date, TargetName, Amount. TargetName column has partial rows with json array values and remaining rows with strings.

I want to extract value[0] from json array. With condition like [case when (targetName is Json type) Then $.value[0] else targetName] How to apply this condition and get the expected result?

Expected outcome: TargetName

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Answer 1

SELECT CASE WHEN JSON_VALID(TargetName)
            THEN TargetName ->> "$[0].value"
            ELSE TargetName
            END AS TargetName ,
       ...