# 字段是否以数字开头
SELECT EMPLOYEE,DAYS FROM EMPLOYEE WHERE SUBSTR(EMPLOYEE_ID,1,1) BETWEEN '0' AND '9';
# 字段内部是否包含数字
SELECT * FROM EMPLOYEE WHERE REGEXP_LIKE (EMPLOYEE_ID,'^[0-9]+[0-9]$');
分享题目：SQL判断字段是否以数字开头或者包含数字
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