【文件属性】：
文件名称：增加一列-SQL语言基础
文件大小：5.26MB
文件格式：PPT
更新时间：2021-04-25 19:38:28
SQL 基础
增加一列
*
DEPT30
EMPNO ENAME ANNSAL HIREDATE
------ ---------- --------
7698 BLAKE 34200 01-MAY-81
7654 MARTIN 15000 28-SEP-81
7499 ALLEN 19200 20-FEB-81
7844 TURNER 18000 08-SEP-81
...
DEPT30
EMPNO ENAME ANNSAL HIREDATE
------ ---------- --------
7698 BLAKE 34200 01-MAY-81
7654 MARTIN 15000 28-SEP-81
7499 ALLEN 19200 20-FEB-81
7844 TURNER 18000 08-SEP-81
...
JOB
新列
“…为表DEPT30 增加一个新列…”
JOB
*
Adding a Column
The graphic adds the JOB column to DEPT30 table. Notice that the new column becomes the last column in the table.