作者:刘志樺伟宇佳君 | 来源:互联网 | 2018-07-13 19:09
查询表table_name中col_name(字符串类型)的值是数字的记录SELECTcol_name,CAST(col_nameASUNSIGNEDINTEGER)ASvalFROMtable_nameWHEREcol_name0ORcol_name0HAVINGCHAR_LENGTH(col_name)CHAR_LENGTH(val);
查询表table_name中col_name(字符串类型)的值是数字的记录 SELECT col_name,CAST(col_name AS UNSIGNED INTEGER) AS val FROM table_name WHERE col_name=0 OR col_name0 HAVING CHAR_LENGTH(col_name)=CHAR_LENGTH(val);
查询表table_name中col_name(字符串类型)的值是数字的记录
SELECT col_name,CAST(col_name AS UNSIGNED INTEGER) AS val
FROM table_name
WHERE col_name="0" OR col_name>0
HAVING CHAR_LENGTH(col_name)=CHAR_LENGTH(val);