CREATE TABLE [IF NOT EXISTS] table_name( column_definition1, column_definition2, …….., table_constraints ); 也可简写为: CREATE TABLE table_name (column_name column_type); 上述语法的参数说明如下: 以下例子中我们将在 RUNOON 数据库中创建数据...
CREATETABLEnew_tblLIKEorig_tbl; [as] query_expression 根据一个查询结果集,创建一个包含这些数据的新表。 CREATETABLEnew_tblASSELECT*FROMorig_tbl; IGNORE | REPLACE 这两个选项表明,当根据select语句创建表时,该如何处理复制唯一键值的行。(how to handle rows that duplicate unique key values when copying...
delete from table_name [where ...] [order by ...] [limit ...]; 删除孙悟空同学的考试成绩 代码语言:javascript 代码运行次数:0 运行 AI代码解释 mysql> delete from exam_result where name = '孙悟空'; Query OK, 1 row affected (0.00 sec) mysql> select * from exam_result where name = ...
create[temporary]table[if not exists]tbl_name[(create_definition,...)][table_options][partition_options][ignore | replace][as]query_expression 2 例子: mysql>createtableperson_as->as->selectid,namefromperson; Query OK,0rows affected (0.01sec) Records:0Duplicates:0Warnings:0mysql>showcreatetabl...
mysql> CREATE TABLE tb_emp3 -> ( -> id INT(11), -> name VARCHAR(25), -> deptID INT(11), -> salary FLOAT, -> PRIMARY KEY(id) -> ); Query OK, 0 rows affected (0.59 sec) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
10000 | +---+---+ # 补充as语法 即可以给字段起别名也可以给表起 mysql> create table t2(id int,name char(16)); # 建个t2表 Query OK, 0 rows affected (0.03 sec) mysql> show tables; # 该数据库内有2个表 +---+ | Tables_in_singe_t1 | +---+ | emp | | t2 | +---+ ...
mysql>CREATETABLErunoob_tbl( ->runoob_idINTNOTNULLAUTO_INCREMENT, ->runoob_titleVARCHAR(100)NOTNULL, ->runoob_authorVARCHAR(40)NOTNULL, ->submission_dateDATE, ->PRIMARYKEY(runoob_id) ->)ENGINE=InnoDBDEFAULTCHARSET=utf8; Query OK,0ROWSaffected(0.16sec) ...
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name (create_definition,...) [table_options] [partition_options] CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)] [table_options] [partition_options] [IGNORE | REPLACE] [AS] query_expression CREATE [TEMPORARY] ...
CREATE TABLE MySQL9.3.0 Source Code Documentation CREATE TABLE Parser When a query is sent to the server, the first step is to invoke the bison parser to build an Abstract Syntax Tree to represent the query text. Assume the following statement:...
".mysqli_connect_error();} $sql="CREATETABLE员工 (idINTNOTNULLPRIMARYKEYAUTO_INCREMENT,姓氏VARCHAR(20),名字VARCHAR(20),电话号码VARCHAR(20),出生日期DATE )";if(mysqli_query($connection,$sql)){ echo"员工表创建成功";} else { echo"创建表出错:".mysqli_error($connection);} ?> ...