5.4.19 mysql_fetch_fields() MYSQL_FIELD*mysql_fetch_fields(MYSQL_RES*result) Description Returns an array of allMYSQL_FIELDstructures for a result set. Each structure provides the field definition for one column of the result set. Return Values ...
MYSQL_FIELD*mysql_fetch_field(MYSQL_RES*result) Description Returns the definition of one column of a result set as aMYSQL_FIELDstructure. Call this function repeatedly to retrieve information about all columns in the result set.mysql_fetch_field()returnsNULLwhen no more fields are left. For me...
获得结果集中的行数: my_ulonglong mysql_num_rows(MYSQL_RES *result) 读取结果集中的一行: MYSQL_ROW mysql_fetch_row(MYSQL_RES *result) mysql_fetch_row 获得结果集中的域的属性: MYSQL_FIELD *mysql_fetch_field(MYSQL_RES *result) 获得域属性数组: MYSQL_FIELD *mysql_fetch_fields(MYSQL_RES *resul...
9.mysql_num_fields() 1 unsigned int mysql_num_fields(MYSQL_RES *result); 返回值:结果集的列数。 10.mysql_fetch_row() 1 MYSQL_ROW mysql_fetch_row(MYSQL_RES *result) ; 描述: 检索结果集的下一行。在mysql_store_result()之后使用时,如果没有要检索的行,mysql_fetch_row()返回NULL。在mysql...
mysql_num_fields mysql_num_rows mysql_fetch_field mysql_fetch_row mysql_free_result 示例代码如下: 代码语言:cpp 代码运行次数:0 运行 AI代码解释 #include<Windows.h>#include<mysql.h>#include<stdio.h>intmain(void){//初始化一个连接句柄MYSQL*mysql=mysql_init(NULL);if(mysql==NULL){printf("erro...
store_result()得到的返回值//MYSQL_FIELD对应的是一个结构体MYSQL_FIELD*fields=mysql_fetch_fields(...
cols = mysql_num_fields(res); MYSQL_ROW row;while( row = mysql_fetch_row(res) ) {for(inti =0; i < cols; i++ ) {if(row[i] !=NULL) {// To display correctly. use chcp 65001.SetConsoleOutputCP(65001);size_tnSize =strlen(row[i]);char*pC = (char*)malloc(sizeof(char) * n...
在调用mysql_fetch_row()期间不会重置错误。 使用说明 行中值的数量由mysql_num_fields(result)给出。如果row包含调用mysql_fetch_row()的返回值,则指向该值的指针的访问范围为row[0]到row[mysql_num_fields(result)-1]。 行中的NULL值由NULL指针指示。如果指针为NULL,则字段为NULL;否则,该字段为空。
Dev-C++连接mysql数据库 01-前期准备 1、下载并安装好 MySQL 2、确保 MySQL 服务正常运行,且能通过如下命令启动MySQL: mysql -h localhost -uroot -p 3、知道 MySQL 安装位置,比如: C:\Program Files\MySQL\MySQL Server 8.0 1. 2. 3. 4. 5. ...
mysql_fetch_field( ) Returns the type of the next table field. mysql_fetch_field_direct( ) Returns the type of a table field, given a field number. mysql_fetch_fields( ) Returns an array of all field structures. mysql_fetch_lengths( ) Returns the lengths of all columns in the current...