1/9/2024 0 Comments Mysql json array to rowsWhen we have used JSON_TABLE to convert our JSON document to a table, we can use the “SQL tool set” and perform relational operations like selection and aggregation on our data. The above query will return the following result: We also need to give the returned table a name, and here we call it people. The columns of the table to be returned with column name, type and the path within the JSON objects to where the value should be found.In this example, it is the objects of the people array. Path to the JSON array which should be converted into a table.In other words, the JSON_TABLE function will be “called” once for each row of the preceding table.) (Note that, as specified by the SQL standard, there is an implicit lateral join between the preceding table and the JSON_TABLE referring to this table. In this example, json_col refers to the column that contains our JSON document. From Microsoft docs (all the details can be found here ): If you don't specify AS JSON for a column, the function returns a scalar value (for example, int, string, true, false) from the specified JSON property on the specified path. The JSON data source: This expression may refer to columns of preceding tables in the FROM list. You can use NVARCHAR (max) as json for Language item inside WITH clause. JSON_TABLE takes the following arguments: Let's say I have a JSON column named data in some MySQL table, and this column is a single array.So, for example, data may contain: 1,2,3,4,5 Now I want to select all rows which have a data column where one of its array elements is greater than 2. Since JSON_TABLE returns a result set, it may be used in the FROM clause.
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