Answer / raveendran

In Oracle/PLSQL, the NVL function lets you substitute a
value when a null value is encountered.

The syntax for the NVL function is:

NVL( string1, replace_with )

string1 is the string to test for a null value.

replace_with is the value returned if string1 is null.

Answer / the superstar rajnikanth

NVL(F,E)
if F is null,it returns expression E.F can be of any type.
the type of E should be the same as that on the left-hand side.

Answer / shivaindu

In Oracle/PLSQL, the NVL function lets you substitute a
value when a null value is encountered.

The syntax for the NVL function
-------------------------------

NVL( string1, replace_with )

Example #1:
----------

select NVL(supplier_city, 'n/a' or ‘0’)
from suppliers;

Answer / dinesh kumar

Converts Null value to Absolute for calculation.

Ex : nvl(commission,0) returns 0 when commission is null.

What is referential integrity ?

3 Answers   BirlaSoft,

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Write one update command to update seqno field of a table on the basis of row number.

4 Answers   HCL,

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What is oracle ? why we should go for oracle database instead of diffrent databases available in the industry.

5 Answers   Polaris,

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create or replace procedure search_matter(empno varchar2) as sql_stmt varchar2(200); stmt varchar2(200); v_table_name varchar2(200); val_pres number; inp_value varchar2(200); type obj_typ is table of cols.column_name%type index by binary_integer; type all_col is table of varchar2(100) index by binary_integer; typ_obj_typ obj_typ; typ_all_col all_col; begin select object_name bulk collect into typ_obj_typ from user_tables,user_objects where table_name = object_name AND object_type = 'TABLE'; select empno into inp_value from dual; dbms_output.put_line('inp value : '||inp_value); for i in typ_obj_typ.first..typ_obj_typ.last loop v_table_name := NULL; v_table_name := typ_obj_typ(i); dbms_output.put_line(i||':'||typ_obj_typ(i)); dbms_output.put_line('....................'); sql_stmt := 'select column_name from cols where table_name = :1 and data_type in (''CHAR'', ''VARCHAR2'', ''NCHAR'', ''NVARCHAR2'',''NUMBER'')'; EXECUTE IMMEDIATE sql_stmt bulk collect into typ_all_col using typ_obj_typ(i); for inside in typ_all_col.first..typ_all_col.last loop dbms_output.put_line('sql stmt: '||sql_stmt); dbms_output.put_line('column name: '||typ_all_col(inside)||'table name: '||typ_obj_typ(i)); stmt := 'select count(*) from ||typ_obj_typ(i)||'; EXECUTE_IMMEDIATE stmt into val_pres ; if val_pres = 1 then dbms_output.put_line('value present col name: '||typ_all_col(inside)||'table name :'||typ_obj_typ(i)); end if; end loop; dbms_output.put_line('....................'); end loop; exception when others then dbms_output.put_line('sql code '||sqlcode||'Table name: '||v_table_name); dbms_output.put_line('sql message '||sqlerrm); end; Compile-time I am getting below error, Plz help to resolve. LINE/COL ERROR -------- ----------------------------------------------------------------- 47/23 PLS-00103: Encountered the symbol "STMT" when expecting one of the following: := . ( @ % ;

0 Answers  

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i have xml source. xml source having lacks of records. i want extract/retrive xml source data using sql query. please tell me how to write query.

4 Answers   TCS,

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What is the current version of postgresql?

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what is global variable in pl/sql

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What is the difference between cross join and natural join?

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write a query filter the null value data following source? name age john 30 smith null null 24 sharp 35 i want output name age john 30 sharp 35

1 Answers   TCS,

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Can I learn sql in a week?

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What are the key differences between SQL and PL SQL?

0 Answers  

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how to decrement dates by 1 in mysql? : Sql dba

0 Answers  

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