/// <summary>
/// 删除约束
/// </summary>
/// <param name="connName">连接名</param>
/// <param name="tableName">表名</param>
/// <param name="ctrName">约束名</param>
public static void deleteConstraint(string connName, string tableName, string ctrName)
{
DatabaseAdmin da = DatabaseAdmin.getInstance(connName);
da.deleteConstraint(tableName, ctrName);
}
