Oracle PL/SQL:CREATE TABLE statement: create a table with primary key.CREATE TABLE statement can be used to create table objects in database. It is possible to add constraints like primary key ,foreign key while
CREATE TABLE Persons ( P_Id int NOT NULL PRIMARY KEY, LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), City varchar(255) ) 如需命名 PRIMARY KEY 约束,并定义多个列的 PRIMARY KEY 约束,请使用下面的 SQL 语法: MySQL / SQL Server / Oracle / MS Access: CREATE ...
"submission_date DATE, ". "PRIMARY KEY ( runoon_id ))ENGINE=InnoDB DEFAULT CHARSET=utf8; "; mysqli_select_db($conn,'RUNOON'); $retval=mysqli_query($conn,$sql); if(!$retval) { die('数据表创建失败: '.mysqli_error($conn)); } ...
CREATE TABLE sensor ( device_id VARCHAR NOT NULL, region VARCHAR NOT NULL, time TIMESTAMP NOT NULL, temperature DOUBLE, humidity BIGINT, PRIMARY KEY(device_id, region, time) ) WITH (DYNAMIC_COLUMNS='TRUE'); 结果验证 您可以执行DESCRIBE table sensor;查看表是否已创建成功。 在集群管理系统的概览...
obclient>CREATETABLEtbl10(col1INTPRIMARYKEY,col2INT)PARALLEL3;Query OK,0rowsaffected 使用函数定义列的默认值。 obclient>CREATESEQUENCE SEQ_PERSONIPTVSEQSTARTWITH1MINVALUE1MAXVALUE10INCREMENTBY2NOCYCLE NOORDER CACHE30;Query OK,0rowsaffected obclient>SELECTLPAD(SEQ_PERSONIPTVSEQ.NEXTVAL,18,TO_CHAR(SYSD...
SQL CREATETABLE[Production].[TransactionHistoryArchive1] ( TransactionIDINTIDENTITY(1,1)NOTNULL,CONSTRAINTPK_TransactionHistoryArchive1_TransactionID PRIMARYKEYCLUSTERED (TransactionID) ); Create a nonclustered primary key with separate clustered index in a new table ...
= column_set_name XML COLUMN_SET FOR ALL_SPARSE_COLUMNS <table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] ( column_name [ ASC | DESC ] [ ,... n ] ) [ WITH FILLFACTOR = fillfactor | WITH ( <index_option> [ ,... ...
{ PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] [ WITH FILLFACTOR = fillfactor | WITH ( <index_option> [ ,... n ] ) ] [ ON { partition_scheme_name ( partition_column_name ) | filegroup | "default" } ] | [ FOREIGN KEY ] REFERENCES referenced_table_name [ ( ref_column ...
The CREATE TABLE statement defines a table. The definition must include its name and the names and attributes of its columns. The definition can include other attributes of the table, such as its primary key and its table space.
其中表约束table_constraint为: [ CONSTRAINT constraint_name ] { CHECK ( expression ) | UNIQUE ( column_name [, ... ] ) index_parameters | PRIMARYKEY( column_name [, ... ] )index_parameters | PARTIAL CLUSTERKEY( column_name [, ... ] )} [ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEF...