--主键,复合主键createtableexample (id numberprimarykey, name varchar2(20));createtableexample1 (id number, name varchar2(20),primarykey(id));createtableexample2 (id number, name varchar2(20));ALTERTABLEexample2ADDPRIMARYKEY (ID)createtableexample3 (id number,name varchar2(20) ,primarykey ...
CREATETABLEexample(idNUMBER,c1BOOLEAN,c2BOOL); 将以下行插入到 example 中: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 INSERTINTOexampleVALUES(1,TRUE,NULL);INSERTINTOexampleVALUES(2,FALSE,true); INSERTINTOexampleVALUES(3,0,'off'); INSERTINTOexampleVALUES(4,'no','yes'); INSERTINTOexample...
createtable新的table名称asselect*from旧的table名称where1=2; 使用1 = 2 的目的是只复制表结构,不复制表中的数据。 优点:操作简单 缺点:无法复制全部属性,索引等就不可复制 方法二:使用sql语句查询建表语句 selectdbms_metadata.get_ddl(类型, 表名称)fromdual; -- 例子: 获取表的ddl语句,表名为examplesele...
create pluggable database PDBSAMPLE admin user lhr identified by lhr CREATE_FILE_DEST = '/u01/app/oracle/oradata'; alter pluggable database PDBSAMPLE open; alter session set container=PDBLHR1; CREATE TABLESPACE example NOLOGGING DATAFILE '/u04/oradata/CDBLHR/PDBLHR1/example01.dbf' SIZE 100M...
CREATE TABLE http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/statements_7002.htm#SQLRF01402 表空间(tableSpace) 段(segment) 盘区(extent) 块(block) 关系 一. Storage 参数说明 1. INITIAL Specify the size of the first extent of the object. Oracle allocates spac...
### **建表语句** ```SQL CREATE TABLE example_table ( ID bigint NOT NULL AUTO_INCREMENT, VARCHAR_COLUMN VARCHAR(255) NOT NULL, VARCHAR_CLM2 VARCHAR(25) DEF 占用空间 时间戳 字符串 原创 A开头非中介暂用昵称 2023-11-03 14:14:45 ...
CREATE TABLE table_name( ... ) TABLESPACE tablespace_name;Code language: SQL (Structured Query Language) (sql) Note that you must have privilege on the tablespace that you specify in the CREATE TABLE statement. Consider the following example. First, create a new table called t1 whose tablespac...
Example1:对职位是PRESIDENT的员工加1000工资,MANAGER的人加500工资 CREATE TABLE emp_new AS SELECT * FROM emp; DECLARE CURSOR empnew_cursor IS SELECT ename,job FROM emp_new FOR UPDATE; BEGIN FOR empnew_record IN empnew_cursor LOOP DBMS_OUTPUT.PUT_LINE('姓名'||empnew_record.ename||'职位'|...
CREATETABLESPACE tbs_example DATAFILE'C:oracleoradatamydbtbs01.dbf'SIZE100M AUTOEXTENDONNEXT10M MAXSIZE UNLIMITED EXTENT MANAGEMENTLOCALSEGMENT SPACE MANAGEMENT AUTO; 上述语句创建了一个名为"tbs_example"的表空间。它包含一个数据文件"tbs01.dbf",初始大小为100M,每次增长10M,最大大小不限制。
Oracle CREATE TABLE statement example# The following example shows how to create a new table namedpersonsin theotschema: CREATETABLEot.persons( person_idNUMBERGENERATEDBYDEFAULTASIDENTITY, first_nameVARCHAR2(50)NOTNULL, last_nameVARCHAR2(50)NOTNULL, PRIMARYKEY(person_id) );Code language:SQL (Str...