what is Difference between Having and Where clause?
Answers were Sorted based on User's Feedback
Answer / chandrakala
Having clause is used for filtering grouped data and where
clause is used for filtering rows.
Is This Answer Correct ? | 33 Yes | 0 No |
Answer / ganesh
where clause check a condition & having clause is use in
group by clause
Is This Answer Correct ? | 12 Yes | 2 No |
Answer / nrapendra
where clause filter the data before gruop by clause and
having clause clause filter the data after group by clause
Is This Answer Correct ? | 9 Yes | 0 No |
Answer / joe
When we used group by that time only we can use having. But without group by we can use having.
Only grouped column have used in having condition
Is This Answer Correct ? | 0 Yes | 1 No |
Answer / tanmoy
We can use arithmetic operator in having clause but it is
not possible for where clause..
Is This Answer Correct ? | 0 Yes | 5 No |
What is sql and how does it work?
Explain what is sql?
wht is the difference between sqlaserver2000 and 2005
Does sql view stored data?
What are the main features of cursor?
What is data types in sql?
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: := . ( @ % ;
Does mysql support pl sql?
What is a pdo connection?
What is the Subquery?
What is union and union all keyword in sql?
What is composite primary key in sql?