##Greater than operator>
'>' operator is used to determine whether the operand on the left is greater than the operand on the right. If Greater than, the return value is 1; otherwise the return value is 0. '>' is used for comparison and judgment. This operator cannot be used for null value judgment.select 'good'>'good',100>2,NULL>NULL;
Greater than or equal to operator>=
'>=' operator is used to determine whether the operand on the left is greater than or equal to the operand on the right. If greater than or equal to, the return value is 1; otherwise, the return value is 0. '>=' cannot be used to determine the null value NULL.select 'good'>='good',100>=2,NULL>=NULL;
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