obclient> CREATE TABLE dup_t1(c1 int) DUPLICATE_SCOPE = 'cluster'; Query OK, 0 rows affected obclient> INSERT INTO dup_t1 VALUES(1); Query OK, 1 row affected obclient> SELECT * FROM dup_t1; +---+ | c1 | +---+ | 1 | +---+ 1 row in set 创建表 tbl1,它有一个整数类...
obclient> CREATE TABLE dup_t1(c1 int) DUPLICATE_SCOPE = 'cluster'; Query OK, 0 rows affected obclient> INSERT INTO dup_t1 VALUES(1); Query OK, 1 row affected obclient> SELECT * FROM dup_t1; +---+ | c1 | +---+ | 1 | +---+ 1 row in set 创建一个名为 test_tbl1 的...
The insert statement adds a new row or rows in a table in theOracle database. We generally use it after we have created a table in the database. One important point to remember is that while inserting records into a table, we must provide a value for every NOT NULL value. Let us lo...
ALTER TABLE文でMODIFY句を指定すると、既存の列またはパーティションの定義を変更できます。 関連項目: オブジェクトの作成の詳細は、『Oracle Database管理者ガイド』および「CREATE TYPE」を参照してください。 表の変更および削除の詳細は、「ALTER TABLE」および「DROP TABLE」を参照してくださ...
Oracle (after v12.2): 128 characters SQL Server: 128 characters MySQL: 64 characters PostgreSQL: 63 characters Create Table Primary Key Syntax You can specify a primary key on a table when you create in two ways: Next to the column data type when you declare it on the same line (an inl...
CREATE FOREIGN TABLE creates an HDFS or OBS foreign table in the current database to access structured data stored on HDFS or OBS. You can also export data in ORC format
To enable a unique or primary key constraint, you must have the privileges necessary to create an index on the table. You need these privileges because Oracle Database creates an index on the columns of the unique or primary key in the schema containing the table. To specify an edition in...
Once connection is prepared, we've prepared a Statement object using createStatement() method. As next step, We've prepared a SQL string to create a new duplicate table EMPLOYEES_O and created the table in database by calling statement.execute() method....
Oracle PL / SQL Table Copy Table Create a copy table and insert value to it SQL> SQL> SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL, 2 ENAME VARCHAR2(10), 3 JOB VARCHAR2(9), 4 MGR NUMBER(4), 5 HIREDATE DATE, 6 SAL NUMBER(7, 2), 7 COMM NUMBER(7, 2), 8 DEPTNO ...
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 table cannot contain duplicate primary key values.Primary key also can be a...