Coalesce in oracle
COALESCE returns first not null value out of all the parameters passed into this function. NOTE: All the parameters have been the same datatype Copy CodeCopiedUse a different BrowserDROP TABLE coalesce_func_test; CREATE…
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NULL in ORACLE
NULL in Oracle NULL = NULL ? Copy CodeCopiedUse a different BrowserSELECT CASE WHEN NULL = NULL THEN 'NULL Equals to NULL' ELSE 'NULL is NOT Equals to NULL' END…
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…
How to Generate XML in Oracle Using SQL
Copy CodeCopiedUse a different BrowserSELECT XMLELEMENT ("ROW", XMLFOREST (empno, ename, hiredate, sal, deptno, mgr, comm)) FROM emp; You might like How to parse XLSX and CSV? How to parse JSON…
Remove Special Character and Extra Space From a String ORACLE/PLSQL
Removing special character using REGEXP: SELECT REGEXP_REPLACE('Sahay*)(^#@Pandey$ashish/Vikas','[^a-z_A-Z ]') FROM DUAL; Remove extra spaces between string using REGEXP: Copy CodeCopiedUse a different BrowserSELECT REGEXP_REPLACE ('Vikas Pandey from Delhi', '[[:blank:]]+', ' ')…
How to Remove New line from a String Using PL/SQL/ORACLE?
To Remove New line from the string: Copy CodeCopiedUse a different BrowserDECLARE p_sting VARCHAR2 (100) := 'This is Vikas from Delhi Now the next line. '; BEGIN DBMS_OUTPUT.put_line (p_sting); DBMS_OUTPUT.put_line…
Reading File From Oracle Directory
How to read Files from Oracle Directory using PL/SQL? File Structure ACCOUNTINGRESEARCHSALESOPERATIONS3 Records5 Records6 Records0 Records How to generate files into Oracle Directory? Copy CodeCopiedUse a different Browser DECLARE l_file…
ORA-00972: identifier is too long
ORA-00972: identifier is too long. Till Oracle 12 C, the identifier length is 30 characters. Starting from 18 C Oracle increased the length of identifier to 128 character. So now…
Use of Merge Statement
Sometimes whenever we want to insert records into table with the conditions For existing records (if found then) Update, For Non Existing records (If not found) then insert Step 1…
Posted inORACLE
Get Current Schema and DB name
Some times we do not know about our schema exist in which db and which is our schema hare is the method to find db and schema name. Copy CodeCopiedUse…