Databases Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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Databases Interview Questions

Questions Answers Views Company eMail

How to create lov dynamically in oracle forms which is data comes from database procedure of out parameter, data will will out parameter of procedure base

1 1571

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: := . ( @ % ;

965

table a has records 1,1,1,1 table b has records 1,1,1,1,1,1 what would be out if perform join for all cases

1290

Sql technical questions

1221

What is view? Can we update view

1367

What is materialized view. What are different methods of refresh?

1342

What if we write return in procedure?

1351

what is cursor. write example of it. What are the attributes of cursor.

1321

How to handle bulk data?

1274

What is the difference between Union and Union all. Which is faster.

1350

What are the steps for performance tuning.

1282

What is parallel hint?

1234

What is the difference between SQL and NoSQL databases

1 949

What is a primary key, and how is it different from a unique key?

3 1149

How do you retrieve the second highest salary from a table?

3 1196

Un-Answered Questions { Databases }

What do you understand by case manipulation functions?

958

What is the difference between multiload and fastload interms of performance?

900

How to convert a string to a date in oracle database?

1003

How to get maxsal , minsal, ename department wise in single query

1508

what is bit datatype and what's the information that can be stored inside a bit column? : Sql server database administration

941

What is bulk collect in oracle?

961

Is postgresql case sensitive?

740

How do you concatenate strings in mysql?

959

What do you mean by flat file database?

866

What is read uncmmited?

1017

How do I run multiple versions of sybase on the same server?

810

How do I make sql search faster?

949

what is difference between group above and group left report

3765

Why do we need different type of parameter?

1005

What are the different sql commands?

1012

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