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 table creation.Primary key is the unique identifier for a row of data.One ...
WITH table-option- 可选-一个或多个表选项(如一个或多个%CLASSPARAMETER子句或STORAGETYPE子句)的逗号分隔列表。 COLLATE sqlcollation- 可选-指定以下SQL排序规则类型之一:%Exact、%Minus、%Plus、%SPACE、%SQLSTRING、%SQLUPPER、%TRUNCATE或%MVR。默认值为名称空间默认排序规则(除非更改,否则为%SQLUPPER)。%SQL...
题目使用下列SQL语句创建教师表: CREATE TABLE 教师表(教师编号 I PRIMARY KEY,; 姓名 C(8) NOT NULL,; 职称 C(10) DEFAULT "讲师") 如果要删除“职称”字段的DEFAULT约束,正确的SQL语句是___。相关知识点: 试题来源: 解析 A 反馈 收藏
CREATE[GLOBALTEMPORARY]TABLEtable(table-element-commalist)[shard-key][WITHtable-option-commalist]table-element::=[%DESCRIPTIONstring][%FILEstring][{%EXTENTSIZE|%NUMROWS}integer][%PUBLICROWID][%ROUTINEstring]{fieldname datatype[AUTO_INCREMENT]|IDENTITY|SERIAL|ROWVERSION[%DESCRIPTIONstring]{[[COLLATE]...
] referenced_table_name [ ( ref_column ) ] | CHECK ( logical_expression ) } <table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } { NONCLUSTERED ( column_name [ ASC | DESC ] [ ,... n ]) | NONCLUSTERED HASH ( column_nam...
syntaxsql 复制 CREATE CLUSTERED COLUMNSTORE INDEX index_name ON [ database_name . [ schema ] . | schema . ] table_name [ORDER (column[,...n])] [WITH ( DROP_EXISTING = { ON | OFF } )] [;] CREATE [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON [ database_name . [ schema...
&sql( CREATE GLOBAL TEMPORARY TABLE TempEmp ( EMPNUM INT NOT NULL, NAMELAST CHAR(30) NOT NULL, NAMEFIRST CHAR(30) NOT NULL, CONSTRAINT EMPLOYEEPK PRIMARY KEY (EMPNUM) ) ) if SQLCODE=0 { w !,"表创建" } else { w !,"SQLCODE=",SQLCODE,": ",%msg ...
Primary key Foreign Key Let's start with SQL Firstly we have to create a database for using a table. Use the following command to create the database. Create database MySQLDemoDb Here "MySQLDemoDb" is our database name. Now step by step, we learn about the SQL table an...
&sql( CREATE GLOBAL TEMPORARY TABLE TempEmp ( EMPNUM INT NOT NULL, NAMELAST CHAR(30) NOT NULL, NAMEFIRST CHAR(30) NOT NULL, CONSTRAINT EMPLOYEEPK PRIMARY KEY (EMPNUM) ) ) if SQLCODE=0 { w !,"表创建" } else { w !,"SQLCODE=",SQLCODE,": ",%msg ...
要确定字段的最大允许值和最小允许值,请使用以下ObjectScript函数: 代码语言:javascript 复制 WRITE$$maxval^%apiSQL(6,2),!WRITE$$minval^%apiSQL(6,2) 请注意,因为p不是数字计数,所以它可以小于刻度的值: 代码语言:javascript 复制 ClassMethodCreateTable4(){fori=0:1:6{w"Max for (",i,",2)=",...