substr function in sqlite code example
Example 1: function in plsql
CREATE FUNCTION function_name … RETURN BOOLEAN IS
Definitions;
BEGIN
Statement;
RETURN "Hello World!";
END;
Example 2: geopoint from json mysql function
Press CTRL+C to copy mysql> SET @json = '{ "type": "Point", "coordinates": [102.0, 0.0]}';
mysql> SELECT ST_AsText(ST_GeomFromGeoJSON(@json));
+--------------------------------------+
| ST_AsText(ST_GeomFromGeoJSON(@json)) |
+--------------------------------------+
| POINT(102 0) |
+--------------------------------------+