Oracle PL/SQL Tutorial/Table/Copy Table

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Содержание

Copying table structure not data

SQL>
SQL> CREATE TABLE myTable (
  2     Name    VARCHAR(50) PRIMARY KEY NOT NULL,
  3     PhoneNo VARCHAR(15) DEFAULT "Unknown Phone",
  4     SSN     VARCHAR(15) NOT NULL,
  5     CHECK (SSN LIKE "[0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9][0-9][0-9]"));
TABLE created.
SQL>
SQL>
SQL> CREATE TABLE My_myTables AS SELECT * FROM myTable
  2  WHERE 1=0;
TABLE created.
SQL>
SQL> DROP TABLE myTable;
TABLE dropped.
SQL> DROP TABLE My_myTables;
TABLE dropped.


Copy table with adding the primary key

SQL> SET echo ON
SQL>
SQL>
SQL>
SQL> -- create demo table
SQL> CREATE TABLE Employee(
  2    ID                 VARCHAR2(4 BYTE)         NOT NULL PRIMARY KEY,
  3    First_Name         VARCHAR2(10 BYTE),
  4    Last_Name          VARCHAR2(10 BYTE),
  5    Start_Date         DATE,
  6    End_Date           DATE,
  7    Salary             Number(8,2),
  8    City               VARCHAR2(10 BYTE),
  9    Description        VARCHAR2(15 BYTE)
 10  )
 11  /
TABLE created.
SQL>
SQL> -- prepare data
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2               VALUES ("01","Jason",    "Martin",  to_date("19960725","YYYYMMDD"), to_date("20060725","YYYYMMDD"), 1234.56, "Toronto",  "Programmer")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                VALUES("02","Alison",   "Mathews", to_date("19760321","YYYYMMDD"), to_date("19860221","YYYYMMDD"), 6661.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                VALUES("03","James",    "Smith",   to_date("19781212","YYYYMMDD"), to_date("19900315","YYYYMMDD"), 6544.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                VALUES("04","Celia",    "Rice",    to_date("19821024","YYYYMMDD"), to_date("19990421","YYYYMMDD"), 2344.78, "Vancouver","Manager")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                VALUES("05","Robert",   "Black",   to_date("19840115","YYYYMMDD"), to_date("19980808","YYYYMMDD"), 2334.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                VALUES("06","Linda",    "Green",   to_date("19870730","YYYYMMDD"), to_date("19960104","YYYYMMDD"), 4322.78,"New York",  "Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                VALUES("07","David",    "Larry",   to_date("19901231","YYYYMMDD"), to_date("19980212","YYYYMMDD"), 7897.78,"New York",  "Manager")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                VALUES("08","James",    "Cat",     to_date("19960917","YYYYMMDD"), to_date("20020415","YYYYMMDD"), 1232.78,"Vancouver", "Tester")
  3  /
1 row created.
SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> SELECT * FROM Employee
  2  /
 
ID   FIRST_NAME           LAST_NAME            START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- -------------------- -------------------- --------- --------- ---------- ---------- ---------------
01   Jason                Martin               25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
02   Alison               Mathews              21-MAR-76 21-FEB-86    6661.78 Vancouver  Tester
03   James                Smith                12-DEC-78 15-MAR-90    6544.78 Vancouver  Tester
04   Celia                Rice                 24-OCT-82 21-APR-99    2344.78 Vancouver  Manager
05   Robert               Black                15-JAN-84 08-AUG-98    2334.78 Vancouver  Tester
06   Linda                Green                30-JUL-87 04-JAN-96    4322.78 New York   Tester
07   David                Larry                31-DEC-90 12-FEB-98    7897.78 New York   Manager
08   James                Cat                  17-SEP-96 15-APR-02    1232.78 Vancouver  Tester
8 rows selected.
SQL>
SQL>
SQL>
SQL> CREATE TABLE iot
  2  ( id, first_name, last_name,
  3    constraint iot_pk PRIMARY KEY(id, first_name, last_name)
  4  )
  5  organization INDEX
  6  compress 2
  7  AS
  8  SELECT id, first_name, last_name FROM employee
  9  /
TABLE created.
SQL>
SQL> SELECT * FROM iot;
 
ID   FIRST_NAME           LAST_NAME
---- -------------------- --------------------
01   Jason                Martin
02   Alison               Mathews
03   James                Smith
04   Celia                Rice
05   Robert               Black
06   Linda                Green
07   David                Larry
08   James                Cat
8 rows selected.
SQL>
SQL> DROP TABLE iot;
TABLE dropped.
SQL>
SQL>
SQL>
SQL> -- clean the table
SQL> DROP TABLE Employee
  2  /
TABLE dropped.


Create a copy by select specific columns

SQL>
SQL> CREATE TABLE employees(
  2    empno      NUMBER(4)
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , msal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2) ) ;
TABLE created.
SQL>
SQL>
SQL> INSERT INTO employees VALUES(1,"Jason",  "N",  "TRAINER", 2,   date "1965-12-18",  800 , NULL,  10);
1 row created.
SQL> INSERT INTO employees VALUES(2,"Jerry",  "J",  "SALESREP",3,   date "1966-11-19",  1600, 300,   10);
1 row created.
SQL> INSERT INTO employees VALUES(3,"Jord",   "T" , "SALESREP",4,   date "1967-10-21",  1700, 500,   20);
1 row created.
SQL> INSERT INTO employees VALUES(4,"Mary",   "J",  "MANAGER", 5,   date "1968-09-22",  1800, NULL,  20);
1 row created.
SQL> INSERT INTO employees VALUES(5,"Joe",    "P",  "SALESREP",6,   date "1969-08-23",  1900, 1400,  30);
1 row created.
SQL> INSERT INTO employees VALUES(6,"Black",  "R",  "MANAGER", 7,   date "1970-07-24",  2000, NULL,  30);
1 row created.
SQL> INSERT INTO employees VALUES(7,"Red",    "A",  "MANAGER", 8,   date "1971-06-25",  2100, NULL,  40);
1 row created.
SQL> INSERT INTO employees VALUES(8,"White",  "S",  "TRAINER", 9,   date "1972-05-26",  2200, NULL,  40);
1 row created.
SQL> INSERT INTO employees VALUES(9,"Yellow", "C",  "DIRECTOR",10,  date "1973-04-27",  2300, NULL,  20);
1 row created.
SQL> INSERT INTO employees VALUES(10,"Pink",  "J",  "SALESREP",NULL,date "1974-03-28",  2400, 0,     30);
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE e
  2  AS
  3  SELECT empno, ename, init, mgr, deptno
  4  FROM   employees;
TABLE created.
SQL>
SQL> SELECT * FROM e;
 EMPNO      last_name       INIT     MGR DEPTNO
------ -------------------- ----- ------ ------
     1 Jason                N          2     10
     2 Jerry                J          3     10
     3 Jord                 T          4     20
     4 Mary                 J          5     20
     5 Joe                  P          6     30
     6 Black                R          7     30
     7 Red                  A          8     40
     8 White                S          9     40
     9 Yellow               C         10     20
    10 Pink                 J     NULL       30
10 rows selected.
SQL>
SQL> DROP TABLE e;
TABLE dropped.
SQL> DROP TABLE employees;
TABLE dropped.
SQL>
SQL>


Create a copy table

SQL>
SQL>
SQL> -- create demo table
SQL> CREATE TABLE Employee(
  2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
  3    First_Name         VARCHAR2(10 BYTE),
  4    Last_Name          VARCHAR2(10 BYTE),
  5    Start_Date         DATE,
  6    End_Date           DATE,
  7    Salary             Number(8,2),
  8    City               VARCHAR2(10 BYTE),
  9    Description        VARCHAR2(15 BYTE)
 10  )
 11  /
TABLE created.
SQL>
SQL> -- prepare data
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary,  City,       Description)
  2               VALUES ("01","Jason",    "Martin",  to_date("19960725","YYYYMMDD"), to_date("20060
725","YYYYMMDD"), 1234.56, "Toronto",  "Programmer")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary,  City,       Description)
  2                VALUES("02","Alison",   "Mathews", to_date("19760321","YYYYMMDD"), to_date("19860
221","YYYYMMDD"), 6661.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary,  City,       Description)
  2                VALUES("03","James",    "Smith",   to_date("19781212","YYYYMMDD"), to_date("19900
315","YYYYMMDD"), 6544.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary,  City,       Description)
  2                VALUES("04","Celia",    "Rice",    to_date("19821024","YYYYMMDD"), to_date("19990
421","YYYYMMDD"), 2344.78, "Vancouver","Manager")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary,  City,       Description)
  2                VALUES("05","Robert",   "Black",   to_date("19840115","YYYYMMDD"), to_date("19980
808","YYYYMMDD"), 2334.78, "Vancouver","Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary, City,        Description)
  2                VALUES("06","Linda",    "Green",   to_date("19870730","YYYYMMDD"), to_date("19960
104","YYYYMMDD"), 4322.78,"New York",  "Tester")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary, City,        Description)
  2                VALUES("07","David",    "Larry",   to_date("19901231","YYYYMMDD"), to_date("19980
212","YYYYMMDD"), 7897.78,"New York",  "Manager")
  3  /
1 row created.
SQL> INSERT INTO Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,
                  Salary, City,        Description)
  2                VALUES("08","James",    "Cat",     to_date("19960917","YYYYMMDD"), to_date("20020
415","YYYYMMDD"), 1232.78,"Vancouver", "Tester")
  3  /
1 row created.
SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> SELECT * FROM Employee
  2  /
ID   FIRST_NAME LAST_NAME  START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
02   Alison     Mathews    21-MAR-76 21-FEB-86    6661.78 Vancouver  Tester
03   James      Smith      12-DEC-78 15-MAR-90    6544.78 Vancouver  Tester
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 Vancouver  Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 Vancouver  Tester
06   Linda      Green      30-JUL-87 04-JAN-96    4322.78 New York   Tester
07   David      Larry      31-DEC-90 12-FEB-98    7897.78 New York   Manager
08   James      Cat        17-SEP-96 15-APR-02    1232.78 Vancouver  Tester
8 rows selected.
SQL>
SQL>
SQL>
SQL> CREATE TABLE employeeCopy AS SELECT * FROM employee;
TABLE created.
SQL>
SQL> SELECT * FROM employeeCopy;
ID   FIRST_NAME LAST_NAME  START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
02   Alison     Mathews    21-MAR-76 21-FEB-86    6661.78 Vancouver  Tester
03   James      Smith      12-DEC-78 15-MAR-90    6544.78 Vancouver  Tester
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 Vancouver  Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 Vancouver  Tester
06   Linda      Green      30-JUL-87 04-JAN-96    4322.78 New York   Tester
07   David      Larry      31-DEC-90 12-FEB-98    7897.78 New York   Manager
08   James      Cat        17-SEP-96 15-APR-02    1232.78 Vancouver  Tester
8 rows selected.
SQL>
SQL> DROP TABLE employeeCopy;
TABLE dropped.
SQL>
SQL>
SQL>
SQL> -- clean the table
SQL> DROP TABLE Employee
  2  /
TABLE dropped.
SQL>
SQL>


Create a copy table and aggregate function

SQL>
SQL> CREATE TABLE lookup_heap(
  2    key_col  PRIMARY KEY,
  3    key_val
  4  )AS
  5  SELECT object_name, max( owner||"_"||object_id )FROM all_objects GROUP BY object_name
  6  /
TABLE created.
SQL>
SQL>
SQL> DROP TABLE lookup_heap;
TABLE dropped.
SQL>


Create a table by copy certain rows

SQL>
SQL>
SQL> CREATE TABLE employees(
  2    empno      NUMBER(4)
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , msal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2) ) ;
TABLE created.
SQL>
SQL>
SQL> INSERT INTO employees VALUES(1,"Jason",  "N",  "TRAINER", 2,   date "1965-12-18",  800 , NULL,  10);
1 row created.
SQL> INSERT INTO employees VALUES(2,"Jerry",  "J",  "SALESREP",3,   date "1966-11-19",  1600, 300,   10);
1 row created.
SQL> INSERT INTO employees VALUES(3,"Jord",   "T" , "SALESREP",4,   date "1967-10-21",  1700, 500,   20);
1 row created.
SQL> INSERT INTO employees VALUES(4,"Mary",   "J",  "MANAGER", 5,   date "1968-09-22",  1800, NULL,  20);
1 row created.
SQL> INSERT INTO employees VALUES(5,"Joe",    "P",  "SALESREP",6,   date "1969-08-23",  1900, 1400,  30);
1 row created.
SQL> INSERT INTO employees VALUES(6,"Black",  "R",  "MANAGER", 7,   date "1970-07-24",  2000, NULL,  30);
1 row created.
SQL> INSERT INTO employees VALUES(7,"Red",    "A",  "MANAGER", 8,   date "1971-06-25",  2100, NULL,  40);
1 row created.
SQL> INSERT INTO employees VALUES(8,"White",  "S",  "TRAINER", 9,   date "1972-05-26",  2200, NULL,  40);
1 row created.
SQL> INSERT INTO employees VALUES(9,"Yellow", "C",  "DIRECTOR",10,  date "1973-04-27",  2300, NULL,  20);
1 row created.
SQL> INSERT INTO employees VALUES(10,"Pink",  "J",  "SALESREP",NULL,date "1974-03-28",  2400, 0,     30);
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE dept20_t AS
  2  SELECT * FROM employees WHERE deptno=20;
TABLE created.
SQL>
SQL> DROP TABLE employees;
TABLE dropped.
SQL>
SQL> DROP TABLE dept20_t;
TABLE dropped.


Create table with primary key

SQL> CREATE TABLE myTable (
  2    word  varchar2(50),
  3    position   int,
  4    doc_id int,
  5    PRIMARY KEY(word,position,doc_id)
  6  );
TABLE created.
SQL>
SQL>
SQL>
SQL> DROP TABLE myTable;
TABLE dropped.