erase clob data : Clob « Data Type « Oracle PL / SQL

erase clob data

 

SQL> CREATE TABLE myTable (
  2    id          INTEGER PRIMARY KEY,
  3    clobData    CLOB NOT NULL
  4  );

Table created.
SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE readClob(id_par IN INTEGER) IS
  2    clobVariable CLOB;
  3    charVariable VARCHAR2(50);
  4    offsetPos INTEGER := 1;
  5    amount_var INTEGER := 50;
  6  BEGIN
  7    initClob(clobVariable, id_par);
  8    DBMS_LOB.READ(clobVariable, amount_var, offsetPos, charVariable);
  9    DBMS_OUTPUT.PUT_LINE('charVariable = ' || charVariable);
 10    DBMS_OUTPUT.PUT_LINE('amount_var = ' || amount_var);
 11  END readClob;
 12  /

Procedure created.

SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE erase_example IS
  2    clobVariable CLOB;
  3    offsetPos INTEGER := 2;
  4    amount_var INTEGER := 5;
  5  BEGIN
  6    SELECT clobData INTO clobVariable FROM myTable WHERE id = 1 FOR UPDATE;
  7
  8    readClob(1);
  9    DBMS_LOB.ERASE(clobVariable, amount_var, offsetPos);
 10    readClob(1);
 11
 12  END erase_example;
 13  /

Procedure created.

SQL>
SQL> drop table myTable;

Table dropped.

1.	clob data type
2.	Use clob type in PL/SQL
3.	Use dbms_lob.erase to remove value from clob type value
4.	Use dbms_lob.fileopen to open bfile
5.	Creating an Internal LOB Table
6.	Copying Internal LOBs
7.	Appending and Writing to LOBs
8.	DBMS_LOB package.
9.	Print out the length of the CLOBs previously INSERTed
10.	Compare clob data
11.	Compare two clobs
12.	Append data to clob
13.	Assign string value to clob type variable
14.	Clob type column
15.	Copy clob data
16.	In() function with clob data
17.	Initialize clob
18.	Read clob type data, DBMS_LOB.READ
19.	Use between ... and with clob data
20.	Use clob to store xml data
21.	clob type data as string
22.	use like operator with clob type data

erase clob data : Clob « Data Type « Oracle PL / SQL

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