![]() And finaly, you need put an alias for your 'select' query. If JSONQUERY finds JSON that is not valid in expression before it finds the value identified by path, the function returns an error. Typically the name of a variable or a column that contains JSON text. See Section 12.16.11, “Spatial GeoJSON Functions”. 2 Answers Sorted by: 4 First, in mysql you don't need to declare a variable, in this case. syntaxsql JSONQUERY ( expression, path ) Arguments expression An expression. Multi-Valued Indexes, provides detailed information and examples. The precise outcome of the sort is subject toĬhange at any time do not rely on it to be consistent betweenĪ set of spatial functions for operating on GeoJSON values is alsoĪvailable. Here's how you can query a JSON column in MySQL: - Getting the params.name string value from events table SELECT params->'.name' FROM events - Getting rows where the browser.name is Chrome - This also shows the difference of using -> vs -> - Using -> will cause strings to be enclosed in quotes SELECT browser->'.name', browser->'.name. SELECT REPLACE(JSONEXTRACT(jsonrecord.json, CONCAT('',number,'.name')), ''', '') AS name, REPLACE(JSONEXTRACT(jsonrecord.json, CONCAT('',number,'.address')), ''', '') AS address FROM ( SELECT row : row + 1 AS number FROM ( SELECT 0 UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6. Queries on JSON columns of InnoDB tables using JSONOVERLAPS () in the WHERE clause can be optimized using multi-valued indexes. > will get the string value while -> will fetch value without. ![]() These values (see Normalization, Merging, and Autowrapping of JSON Values), and thus MySQL provides two operators ( -> and -> ) to extract data from JSON columns. Arguments parsed as JSON areįunctions that return JSON values always perform normalization of Indicates by returning 1 or 0 whether a given candidate JSON document is contained within a target JSON. The functions in this section perform search operations on JSON values to extract data from them, report whether data exists at a location within them, or report the path to data within them. The functions described in this section perform operations on JSONĭata type and additional examples showing how to use theseįunctions, see Section 11.5, “The JSON Data Type”.įor functions that take a JSON argument, an error occurs if theĪrgument is not a valid JSON value. 12.18.3 Functions That Search JSON Values. 12.17.1 JSON Function Reference 12.17.2 Functions That Create JSON Values 12.17.3 Functions That Search JSON Values 12.17.4 Functions That Modify JSON Values 12.17.5 Functions That Return JSON Value Attributes 12.17.6 JSON Table Functions 12.17.7 JSON Schema Validation Functions 12.17.8 JSON Utility Functions
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