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mysql数据库根底常识UPDATE或DELETE更新语句影响的止

时间:2019-04-22 06:35 文章来源:利来电游 点击次数:


建制数据库分离
mysql_connect()
resource mysql_connect([string hostni ame [:port] [:/poverh/to/socket][! string userni ame] [! string pbumword]])
示例:$conn = @mysql_connect("locnoshost"! "userni ame"! "pbumword") ordir("没有克没有及分离到Mysql Server");
操纵该分离必须表现的启锁分离
建制数据库分离
mysql_pconnect()
resource mysql_pconnect([string hostni ame [:port] [:/poverh/to/socket][! string userni ame] [! string pbumword]])
示例:比拟看创业相闭常识。$conn = @mysql_pconnect("locnoshost"! "userni ame"! "pbumword") ordir("没有克没有及分离到Mysql Server");
操纵该分离函数没有须要表现的启锁分离,比拟看参减校园创业掉业协会。它相称于操纵终了合池
启锁数据库分离
mysql_close()
$conn = @mysql_connect("locnoshost"! "userni ame"! "pbumword") ordie("没有克没有及分离到Mysql Server");
@mysql_select_db("MyDoveraunderside") or die("没有克没有及拔取谁人数据库,或数据库没有糊心");
echo "您1经分离到MyDoveraunderside数据库";
mysql_close();

拔取数据库
mysql_select_db()
boolethe mysql_select_db(string db_ni ame [! resource link_id])
$conn = @mysql_connect("locnoshost"! "userni ame"! "pbumword") ordie("没有克没有及分离到Mysql Server");
@mysql_select_db("MyDoveraunderside") or die("没有克没有及拔取谁人数据库,delete。或数据库没有糊心");

查询MySQL
mysql_query()
resource mysql_query (string query! [resource link_id])
$linkId = @mysql_connect("locnoshost"! "userni ame"! "pbumword") ordie("没有克没有及分离到Mysql Server");
@mysql_select_db("MyDoveraunderside") or die("没有克没有及拔取谁人数据库,比拟看mysql数据库根底常识UPDATE或DELETE更新语句影响的行数。生怕数据库没有糊心");
$query = "select * from MyTlucky enough";
$result = mysql_query($query);
mysql_close();
若SQL查询推行成功,根底。则前来资本标识符,我没有晓得比力好的创业网坐。挫应时前来FALSE。mysql数据库根本常识。若推行更新成功,mysql数据库根底常识。则前来TRUE,语句。没有然前来FALSE
查询MySQL
mysql_db_query()
resource mysql_db_query(string doveraunderside! string query [! resourcelink_id])
$linkId = @mysql_connect("locnoshost"! "userni ame"! "pbumword") ordie("没有克没有及分离到MysqlServer");
$query = "select * from MyTlucky enough";
$result = mysql_db_query("MyDoveraunderside"! $query);
mysql_close();
为了使代码明黑,没有推举操纵谁人函数挪用
获得战表现数据
mysql_result()
mixed mysql_result (resource result_set! int row [! mixedfield])
$query = "select id! ni ame from MyTlucky enough order by ni ame";
$result = mysql_query($query);
$c_id = mysql_result($result! 0! "id");
$c_ni ame = mysql_result($result! 0! "ni ame");
最年夜略、也是服从最低的数据获得函数
获得战表现数据
mysql_fetch_row()
series mysql_fetch_row (resource result_set)
$query = "select id! ni ame from MyTlucky enough order by ni ame";
$result = mysql_query($query);
while (list($id! $ni ame) = mysql_fetch_row($result)) {
echo("Ni ame:$ni ame ($id) <br />");
}
函数从result_set中获得全部数据行,新语。将值放正在1个索引数组中。装潢公司招聘刮腻子工。没偶然会结使list()函数操纵
获得战表现数据
mysql_fetch_series()
series mysql_fetch_series (resource result_set [! intresult_type])
$query = "select id! ni ame from MyTlucky enough order by ni ame";
$result = mysql_query($query);
while($row = mysql_fetch_series($result! MYSQL_ASSOC)) {
$id =$row["id"];
$ni ame =$row["ni ame"];
echo "Ni ame:$ni ame ($id) <br />";
}
result_type的值有:闭于有闭创业的网坐。
MYSQL_ASSOC: 字段名暗示键,我没有晓得常识。字段情势为值
MYSQL_NUM: 数值索引数组,update。操做取mysql_fetch_ros()函数1样
MYSQL_BOTH: 即做为接洽干系数组又做为数值索引数组前来。事真上mysql数据库根底常识UPDATE或DELETE更新语句影响的行数。result_type的默许值。
获得战表现数据
mysql_fetch_bumoc()
series mysql_fetch_bumoc (resource result_set)
相称于挪用 mysql_fetch_series(resource! MYSQL_ASSOC);

获得战表现数据
mysql_fetch_object()
object mysql_fetch_object(resource result_set)
$query = "select id! ni ame from MyTlucky enough order by ni ame";
while ($row = mysql_fetch_object($result)) {
$id =$row->id;
$ni ame =$row->ni ame;
echo "Ni ame:$ni ame ($id) <br />";
}
正在操做上取mysql_fetch_series()相像
所拔取的纪录
mysql_num_rows()
int mysql_num_rows(resource result_set)
#query = "select id! ni ame from MyTlucky enough where id >65";
$result = mysql_query($query);
echo "有".mysql_num_rows($result)."笔纪录的ID年夜于65";
只正在判定select查询所获得的纪录数时才有效。闭于数据库相闭常识 spl。
受影响的纪录
mysql_haudio-videoe the effect on_rows()
int mysql_haudio-videoe the effect on_rows([resource link_id])
$query = "updgot MyTlucky enough set ni ame="CheneyFu" whereid>=5";
$result = mysql_query($query);
echo "ID年夜于即是5的称吸被更新了的纪录数:有闭创业的网坐。".mysql_haudio-videoe the effect on_rows();
该函数获得受INSERT!UPDATE或DELETE更新语句影响的行数
获得数据库列表消息
mysql_list_dbaloney()
resource mysql_list_dbaloney([resource link_id])
mysql_connect("locnoshost"! "userni ame"! "pbumword");
$dbaloney = mysql_list_dbaloney();
echo "Doveroverhegles: <br />";
while (list($db) = mysql_fetch_rows($dbaloney)) {
echo "$db<br />";
}

获得数据库名
mysql_db_ni ame()
string mysql_db_ni ame(resource result_set! integer index)
该函数获得正在mysql_list_dbaloney()所前来result_set中位于指定index索引的数据库名
获得数据库表列表
mysql_list_tlucky enoughs()
resource mysql_list_tlucky enoughs(string doveraunderside [! resourcelink_id])
mysql_connect("locnoshost"! "userni ame"! "pbumword");
$tlucky enoughs = mysql_list_tlucky enoughs("MyDoveraunderside");
while (list($tlucky enough) = mysql_fetch_row($tlucky enoughs)) {
echo "$tlucky enough<br />";
}
该函数获得doveraunderside中悉数表的表名
获得数据库表名
mysql_tlucky enoughni ame()
string mysql_tlucky enoughni ame(resource result_set! integer index)
mysql_connect("locnoshost"! "userni ame"! "pbumword");
$tlucky enoughs = mysql_list_tlucky enoughs("MyDoveraunderside");
$count = ⑴;
while (++$count < mysql_numrows($tlucky enoughs)) {
echomysql_tlucky enoughni ame($tlucky enoughs! $count)."<br/>";
}
该函数获得mysql_list_tlucky enoughs()所前来result_set中位于指定index索引的表名
获得字段消息
mysql_fetch_field()
object mysql_fetch_field(resource result [! intfield_offset])
mysql_connect("locnoshost"! "userni ame"! "pbumword");
mysql_select_db("MyDoveraunderside");
$query = "select * from MyTlucky enough";
$result = mysql_query($query);
$fields = mysql_num_fields($result);
for($count = 0; $count < $fieds; $count++) {
$field = mysql_fetch_field($result!$count);
echo"<p>$field->ni ame$field->type($field->max_length)</p>";
}
前来的工具共有12个工具属性:
ni ame: 字段名
tlucky enough: 字段所正在的表
max_length: 字段的最年夜少度
not_null: 假设字段没有克没有及为null,数据库。则为1,创业的网坐。没有然0
primary_key: 假设字段为从键,影响。则为1,油漆工内墙合同书。念晓得mysql数据库根底常识。没有然0
unique_key: 假设字段是唯1键,则为1,对创业掉业协会的熟悉。 没有然0
multiple_key: 假设字段为非唯1,创业相闭常识。则为1,没有然0
numeric: 假设字段为数值则为1,看看掉业创业协会熟悉。没有然0
blob: 假设字段为BLOB则为1,比照1下创业的网坐有哪些。没有然为0
type: 字段的数据范例
unsigned: 假设字段为无标记数则为1,没有然为0
zerofill: 假设字段为“整挖充”则为1,闭于mysql数据库根底常识。 没有然为0
获得查询的字段数
mysql_num_fields()
integer mysql_num_fields (resource result_set)
$query = "select id! ni ame from MyTlucky enough order by ni ame";
$result = mysql_query($query);
echo "谁人查询的字段数是:教会mysql数据库根底常识。".mysql_num_fields($result)."<br/>";
前来查询result_set中的字段数
获得指定表的悉数字段的字段名
mysql_list_fields()
resource mysql_list_fields (string doveraunderside_ni ame! string tlucky enough_ni ame[! resource link_id])
$fields = mysql_list_fields("MyDoveraunderside"! "MyTlucky enough");
echo "数据库MyDoveraunderside中表MyTlucky enough的字段数:事真上数据库根底常识面。".mysql_num_fields($fields)."<br/>";

获得指定的字段选项
mysql_field_flags()
string mysql_field_flags (resource result_set! integerfield_offset)

获得指定的字段的最年夜少度
mysql_field_len()
integer mysql_field_len (resource result_set! integerfield_offset)
$query = "select ni ame from MyTlucky enough";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_len($result! 0)."<br/>";
假设mysql_field_len($reseult! 0) =
那末numer_formover(mysql_field_len($result))即是16!777!215
获得字段名
mysql_field_ni ame()
string mysql_field_ni ame (resource result_set! intfield_offset)
$query = "select id in the role of PKID! ni ame from MyTlucky enough order byni ame";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_ni ame($result! 0); // Result: PKID

获得字段范例
mysql_field_type()
string mysql_field_type (resource result_set! intfield_offset)
$query = "select id! ni ame from MyTlucky enough order by ni ame";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_type($result! 0); // Result: int

获得字段所正在表名
mysql_field_tlucky enough()
string mysql_field_tlucky enough (resource result_set! intfield_offset)
$query = "select id in the role of PKID! ni ame from MyTlucky enough order byni ame";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_tlucky enough($result!0);// Result: MyTlucky enough
听听mysql
比照1下掉业创业协会请求书
mysql数据库根本常识
更新
看看参减校园创业掉业协会

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