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 1550

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: := . ( @ % ;

958

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

1281

Sql technical questions

1201

What is view? Can we update view

1352

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

1330

What if we write return in procedure?

1334

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

1309

How to handle bulk data?

1269

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

1341

What are the steps for performance tuning.

1268

What is parallel hint?

1220

What is the difference between SQL and NoSQL databases

1 933

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

3 1115

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

3 1159

Un-Answered Questions { Databases }

What is a nvl function? How can it be used?

959

Explain the concepts and capabilities of sql server?

922

Who invented postgresql?

739

What is the reports view in oracle sql developer?

925

Can we write trigger for view?

951

What are the 4 main objects of a database?

930

Is mysql a programming language?

833

What is mean by clustered index and non clustered index, give syntax of creation? : sql server database administration

1032

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

1127

If the master device is full, how do I make the master database bigger?

910

You are creating a Index on EMPNO column in the EMPLOYEE table. Which statement will you use?

1171

What is mysql_query?

795

When to use inner join and left join?

904

What are the Types of repositories in ODI?

538

What is shared buffer in postgres?

730

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