What is the difference between DELETE and TRUNCATE?
Answer Posted / anitha
If we are using the delete command means the content of the
table will be deleted.but we can recover that data by using
the roll back query in my sql.
But this one is not possible we can use truncate.so some
times of our carelessness we can loss some valuable and
sensitive datas.
so make sure of that before using truncate...
Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
how to use like conditions? : Sql dba
How many postgresql users are there, worldwide?
Can we commit in trigger?
Is inner join same as self join?
What is rank () in sql?
How to Execute a Package in PL/SQL.?
What does the sign mean in sql?
Give the order of sql select?
What does joining a thread mean?
Why is pl sql used?
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: := . ( @ % ;
How many developers work on postgresql?
How do I access sql anywhere database?
Is it possible to Restore a Dropped Table using Rollback Command in Oracle SQL Plus ?
How to use transactions efficiently : transact sql