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CREATE TABLE TEMP.A_PROBE
(
DATETIME DATE,
PROBE NUMBER,
TEMPERATURE NUMBER
);
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '24/01/2018' , 1 , 21.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '24/01/2018' , 2 , 22.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '24/01/2018' , 3 , 23.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '25/01/2018' , 1 , 18.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '25/01/2018' , 2 , 19.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '25/01/2018' , 3 , 20.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '26/01/2018' , 1 , 15.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '26/01/2018' , 3 , 15.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '27/01/2018' , 1 , 17.5 );
INSERT INTO TEMP.A_PROBE (DATETIME, PROBE, TEMPERATURE) VALUES ( '27/01/2018' , 2 , 18.5 );
SELECT MAX(PROBE) FROM TEMP.A_PROBE |