Please try the below mysql code :

SELECT * FROM CITY WHERE COUNTRYCODE = "USA" AND POPULATION > 100000;

SET SERVEROUTPUT ON DECLARE CURSOR ISHI IS SELECT * FROM CITY WHERE POPULATION>=100000 AND COUNTRYCODE='USA'; DIS CITY%ROWTYPE; BEGIN OPEN ISHI; LOOP FETCH ISHI INTO DIS; EXIT WHEN ISHI%NOTFOUND; DBMS_OUTPUT.PUT_LINE(DIS.ID||' '||DIS.NAME||' ' ||DIS.COUNTRYCODE||' '||DIS.DISTRICT||' '||DIS.POPULATION); END LOOP; CLOSE ISHI; END; /

SET SERVEROUTPUT ON DECLARE CURSOR ISHI IS SELECT * FROM CITY WHERE POPULATION>=100000 AND COUNTRYCODE='USA'; DIS CITY%ROWTYPE; BEGIN OPEN ISHI; LOOP FETCH ISHI INTO DIS; EXIT WHEN ISHI%NOTFOUND; DBMS_OUTPUT.PUT_LINE(DIS.ID||' '||DIS.NAME||' ' ||DIS.COUNTRYCODE||' '||DIS.DISTRICT||' '||DIS.POPULATION); END LOOP; CLOSE ISHI; END; /

Certainly! Here is the SQL query in markdown format:

CREATE INDEX idx_population ON city(population);
CREATE INDEX idx_countrycode ON city(countrycode);

SELECT *
FROM city
WHERE 
    population > 100000 AND 
    countrycode = "USA";

select * from CITY where POPULATION>100000 and COUNTRYCODE="USA";