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 1657

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: := . ( @ % ;

1001

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

1361

Sql technical questions

1280

What is view? Can we update view

1439

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

1393

What if we write return in procedure?

1429

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

1391

How to handle bulk data?

1310

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

1402

What are the steps for performance tuning.

1337

What is parallel hint?

1326

What is the difference between SQL and NoSQL databases

1 1044

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

3 1275

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

3 1344

Un-Answered Questions { Databases }

what are different types of collation sensitivity? : Sql dba

1065

What is considered a database?

999

What is the maximum size of sql server database?

1009

What do database languages do?

939

your sql server is running out of disk space. You notice that there are several large files with ldf extensions what are these files? : Sql server administration

985

What is the master or primary key in mongodb?

Which is the main third-party tool used in sql server?

942

What is difference between mongodb and dynamodb?

what is collation? : Sql dba

1152

What is mysql sleep process?

1033

Are sql connections encrypted?

1022

How do temporal tables work?

957

How to declare a cursor with "declare ... Cursor" in ms sql server?

1046

What is inner join in sql server joins?

1035

What happens to index when table is dropped?

822

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