Uyenza njani itafile yedatha kwisiseko sedatha seMySQL? Yenza umyalelo wetafile yedatha / ingxelo / isintaksi kwi-MySQL

MySQL databaseUyenza njani itafile yedatha?MySQLYenza umyalelo wetafile yedatha/ingxelo/isintaksi ngaphakathi

I-MySQL yenza itafile yedatha

Ukudala itafile yedatha ye-MySQL kufuna olu lwazi lulandelayo:

• 表名
• Igama lendawo yetafile
• chaza indawo nganye yetafile

Igrama

Oku kulandelayo sisivakalisi se-SQL ngokubanzi sokwenza iitafile zedatha ye-MySQL:

CREATE TABLE table_name (column_name column_type);

Kulo mzekelo ulandelayo siyakwenza itafile yedatha chenweiliang_tbl kwisiseko sedatha se-chenweiliang:

CREATE TABLE IF NOT EXISTS `chenweiliang_tbl`(
   `chenweiliang_id` INT UNSIGNED AUTO_INCREMENT,
   `chenweiliang_title` VARCHAR(100) NOT NULL,
   `chenweiliang_author` VARCHAR(40) NOT NULL,
   `submission_date` DATE,
   PRIMARY KEY ( `chenweiliang_id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

Uhlalutyo lomzekelo:

• Ukuba awufuni ukuba intsimi ibe byte Iipropati zamasimi zinokumiselwa njenge AKUKHO NULL, xa usebenzisa i-database, ukuba idatha efakwe kulo mmandlabyte , impazamo iya kuxelwa.
• I-AUTO_INCREMENT ichazwa njengophawu lokwandisa ngokuzenzekelayo, olusetyenziswa ngokubanzi kwizitshixo eziphambili, kwaye ixabiso liya kunyuswa ngokuzenzekelayo ngo-1.
• I-PRIMARY KEY igama elingundoqo lisetyenziselwa ukuchaza ikholamu njengesitshixo sokuqala.Ungasebenzisa iikholamu ezininzi ukuchaza isitshixo sokuqala, esahlulwe ziikoma.
• I-ENGINE imisela i-injini yokugcina, kwaye i-CHARSET icwangcisa i-encoding.

Yenza itheyibhile kwi-prompt yomyalelo

Iitafile zedatha ye-MySQL zingenziwa ngokulula nge-mysql> iwindow yomyalelo.Ungasebenzisa ingxelo yeSQL YENZA ISICWANGCISO ukwenza itafile yedatha.

Umzekelo

Oku kulandelayo ngumzekelo wokwenza itafile yedatha chenweiliang_tbl:

root@host# mysql -u root -p
Enter password:*******
mysql> use chenweiliang;
Database changed
mysql> CREATE TABLE chenweiliang_tbl(
   -> chenweiliang_id INT NOT NULL AUTO_INCREMENT,
   -> chenweiliang_title VARCHAR(100) NOT NULL,
   -> chenweiliang_author VARCHAR(40) NOT NULL,
   -> submission_date DATE,
   -> PRIMARY KEY ( chenweiliang_id )
   -> )ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.16 sec)
mysql>

Qaphela:I-MySQL yomyalelo weterminator yisemicolon (;).

Yenza itafile yedatha usebenzisa iscript sePHP

Unokusebenzisa ii-PHP's mysqli_query() umsebenzi ukwenza itheyibhile yedatha esuka kwisiseko sedatha esikhoyo.

Umsebenzi uneparameters ezimbini kwaye ubuyisela TRUE ukuba uphumezo luphumelele, kungenjalo ibuyisela FALSE.

Igrama

mysqli_query(connection,query,resultmode);

Umzekelo

Lo mzekelo ulandelayo usebenzisa iskripthi se-PHP ukwenza itafile yedatha:

<?
 php
 $dbhost = 'localhost:3306'; // mysql服务器主机地址
 $dbuser = 'root'; // mysql用户名
 $dbpass = '123456'; // mysql用户名密码
 $conn = mysqli_connect($dbhost, $dbuser, $dbpass);
 if(! $conn )
 {
 die('连接失败: ' . mysqli_error($conn));
 }
 echo '连接成功<br />';
 $sql = "CREATE TABLE chenweiliang_tbl( ".
 "chenweiliang_id INT NOT NULL AUTO_INCREMENT, ".
 "chenweiliang_title VARCHAR(100) NOT NULL, ".
 "chenweiliang_author VARCHAR(40) NOT NULL, ".
 "submission_date DATE, ".
 "PRIMARY KEY ( chenweiliang_id ))ENGINE=InnoDB DEFAULT CHARSET=utf8; ";
 mysqli_select_db( $conn, 'chenweiliang' );
 $retval = mysqli_query( $conn, $sql );
 if(! $retval )
 {
 die('数据表创建失败: ' . mysqli_error($conn));
 }
 echo "数据表创建成功\n";
 mysqli_close($conn);
 ?>