text: create table stock_basic (
    id varchar2(10)  NOT NULL PRIMARY KEY,
    market varchar2(4) NOT NULL ,
    name varchar2(20)  NOT NULL
  );
  
  
  create table stock_index(
    id varchar2(10)  NOT NULL PRIMARY KEY,
    sDate varchar2(10)  NOT NULL,
    ema12 number,
    ema26 number
  );