Table Blob to Oracle Directory

How to save table images to oracle directory? Files from table to Oracle directory DECLARE l_file UTL_FILE.file_type; l_buffer RAW (32767); l_amount BINARY_INTEGER := 32767; l_position INTEGER := 1; l_blob_length INTEGER; BEGIN FOR l_cnt IN (SELECT filename, product_image FROM demo_product_info) LOOP l_file := …

Oracle NULLIF() Function

Oracle NULLIF() Function: The Oracle NULLIF() function accepts only two arguments. If the both arguments are equal it returns a null value. In case the arguments are not equal, the NULLIF() function returns the first argument and if any arguments will null then function return an error. Syntax of the NULLIF() …

Oracle NVL2 Function

Oracle NVL2 Function: NVL2() function is an extend version of the NVL() function with different options based on whether a NULL value exists. Oracle NVL2() function allow three parameters. If the first parameter is not null, then it returns the second parameter. In case the second parameter is null, then it returns the …

Oracle Decode Function

Oracle Decode Function: Oracle DECODE() function compares the first argument with the second argument. IF they are equal, the function returns the third argument otherwise return default value. The Oracle/PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement: SELECT DECODE (1, 1, 'ONE', …

Oracle NVL Function

Oracle NVL Function: The NVL function allow you to replace null values with a default value. If the first parameter is null, the function returns the second parameter. If the first parameter have some value then always return first value. Note := NVL function replaces null value with same type data. Syntax of the …

Oracle NULL-Related Functions

Oracle NULL-Related Functions. There are different type of null related function in oracle. NVL NVL function will check whether the first input parameter is null, if its null value, it returns the second parameter value. DECODE The Oracle/PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement. * …

NULL in ORACLE

NULL in Oracle NULL = NULL ? SELECT CASE WHEN NULL = NULL THEN 'NULL Equals to NULL' ELSE 'NULL is NOT Equals to NULL' END NULL_ FROM DUAL; NULL_ NULL is NOT Equals to NULL COUNT with NULLs WITH tab AS (SELECT 10 a FROM DUAL UNION ALL SELECT NULL a FROM DUAL UNION ALL SELECT 2 a FROM DUAL) …

Cursors in PL/SQL

What is cursor: Pointer to the memory location where the information about sql stmt or DML statement got executed. There are two types of cursors − Implicit Cursor:= Any Select Stmt Or Any SQL Stmt Executed By Oracle Is Through Cursor And User Don’t Have Controlled On Implicit Cursor But Use Can Get Information …

Reading File From Oracle Directory

How to read Files from Oracle Directory using PL/SQL? File Structure ACCOUNTING RESEARCH SALES OPERATIONS 3 Records 5 Records 6 Records 0 Records How to generate files into Oracle Directory? DECLARE l_file UTL_FILE.file_type; l_read VARCHAR2 (32767); BEGIN l_file := UTL_FILE.fopen ('MY_DIR', …

How to Install Apex in Oracle 19 C

How to install APEX in Oracle 19 C Download APEX from Oracle products. Download APEX 19.2 Oracle 19 C is multi tenant architecture database. We can create multiple Pluggable databases (PDBs ) and each database can have one APEX instance. Extract the Zip file in the system folder. Open Command Prompt (CMD) as …