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

Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)

Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)

Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)

Database Management (1411)
Databases AllOther (288)

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 1656

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

1360

Sql technical questions

1276

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?

1428

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

1389

How to handle bulk data?

1309

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

1401

What are the steps for performance tuning.

1336

What is parallel hint?

1323

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 1274

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

3 1343

Un-Answered Questions { Databases }

What is postgis and postgresql?

881

what do u mean by implementation?

2156

What is the use of @@spid?

1001

Name the sql joins that are available in informix.

how to use myisamchk to check or repair myisam tables? : Sql dba

970

If a tablespace has a default pctincrease of zero what will this cause (in relationship to the smon process)?

590

Explain what stored procedure sp_replcounters is used for? : sql server replication

1518

I have 2 tables with 1 million rows each. I have updated 1 row in first and 1 million update on second table. Now I commit both the updates. Which one will commit fast and Why?

2617

What is difference between aggregate and analytic function?

932

How to update values on multiple rows in oracle?

1034

How many types of v variables'? Where will appear for variables in odi?

572

what is the difference between LENGTH AND SIZE?

2480

How do I install and use mysql?

925

What is dbms in mysql?

969

What triggers long term care?

1034

For More Un-Answered { Databases } Questions Click Here