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Select COLUMN_NAME ÁÐÃû, DATA_TYPE ×Ö¶ÎÀàÐÍ, COLUMN_COMMENT ×Ö¶Î×¢ÊÍ
from INFORMATION_SCHEMA.COLUMNS
Where table_name = 'companies'##±íÃû
AND table_schema = 'testhuicard'##Êý¾Ý¿âÃû
AND column_name LIKE 'c_name'##×Ö¶ÎÃû
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Select table_name  ±íÃû,TABLE_COMMENT ±í×¢ÊÍ from INFORMATION_SCHEMA.TABLES  Where table_schema = 'testhuicard' ##Êý¾Ý¿âÃû
AND table_name LIKE 'companies'##±íÃû
²Î¿¼http://dev.mysql.com/doc/refman/5.1/zh/information-schema.html.
mysqlÊֲ᣺23.1. INFORMATION_SCHEMA±í
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       $tt = mysql_query("show table status;");
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       while($re = mysql_fetch_array($tt,MYSQL_ASSOC)){
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                        $table_info[] = $re;
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