Here is a dynamic solution that works for most SQL data arrays...
I have adapted it to show you how it can work for you...
[{"id":"a80817a3d567f813","type":"inject","z":"553814a2.1248ec","name":"Fake DB data","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[{\"LocalCol\":\"2020-11-18 18:25:48.906\",\"PS3 Output Temp\":21.3},{\"LocalCol\":\"2020-11-18 18:16:23.957\",\"PS3 Output Temp\":21.6},{\"LocalCol\":\"2020-11-18 18:14:06.429\",\"PS3 Output Temp\":21.7},{\"LocalCol\":\"2020-11-18 18:13:50.943\",\"PS3 Output Temp\":21.6}]","payloadType":"json","x":130,"y":1760,"wires":[["a60265a037b7791f"]]},{"id":"a60265a037b7791f","type":"function","z":"553814a2.1248ec","name":"DB Data to Chart data","func":"/* DB Data\n[\n {\n \"Timestamp\": \"2020-11-18 18:25:48.906\",\n \"Temp\": 21.3,\n \"Light\": 15,\n \"Pressure\": 18100.2,\n \"Humidity\": 31.2\n },\n]\n*/\n/* Desired format\n[{\n\"series\": [\"temp\", \"humidity\"],\n\"data\": [\n [{ \"x\": 1504029632890, \"y\": 5 }, //series 1 data\n { \"x\": 1504029636001, \"y\": 4 },\n ],\n [{ \"x\": 1504029633514, \"y\": 6 }, //series 2 data\n { \"x\": 1504029636622, \"y\": 7 },\n ],\n],\n\"labels\": [\"\"]\n}]\n*/\n\nvar series = [];\nvar data = msg.payload;\nif (!data || !Array.isArray(data) || !data.length) {\n node.warn(\"expected an array of data with at least 1 element\");\n return null;\n //alternatively return the msg with a null payload to clear graph\n}\n\nconst tsField = \"LocalCol\";\nvar _f = Object.keys(data[0]);\nvar fields = [];\nvar fi = 0;\n_f.forEach(function(elem) {\n if (elem != tsField) {\n fields.push(elem);\n series[fi++] = [];\n }\n});\n\n//loop each row and build an array in the required format\nfor (let index = 0; index < msg.payload.length; index++) {\n const row = msg.payload[index];\n var t = new Date(row[tsField]).valueOf()\n var i = 0;\n for (let f = 0; f < fields.length; f++ ) {\n let field = fields[f];\n series[f].push({ \"x\": t, \"y\": row[field] })\n }\n}\n\n\nmsg.payload = [\n {\n \"series\": fields,\n \"data\": series,\n \"labels\": [\"\"]\n }\n];\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":360,"y":1760,"wires":[["9ea012281f268c03","e9a71972ade69462"]]},{"id":"9ea012281f268c03","type":"debug","z":"553814a2.1248ec","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":610,"y":1760,"wires":[]},{"id":"e9a71972ade69462","type":"ui_chart","z":"553814a2.1248ec","name":"","group":"dea21ffd.1483","order":4,"width":"6","height":"7","label":"data","chartType":"line","legend":"true","xformat":"HH:mm:ss","interpolate":"bezier","nodata":"","dot":false,"ymin":"","ymax":"","removeOlder":"2","removeOlderPoints":"1000","removeOlderUnit":"3600","cutout":0,"useOneColor":false,"useUTC":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"outputs":1,"useDifferentColor":false,"x":590,"y":1820,"wires":[[]]},{"id":"dea21ffd.1483","type":"ui_group","name":"Pump Status","tab":"dd590918.d334c8","order":1,"disp":true,"width":"6","collapse":false},{"id":"dd590918.d334c8","type":"ui_tab","name":"Pool Control","icon":"dashboard","disabled":false,"hidden":false}]
