I need to list out all tables in the database where a particular employee made changes to records. I'm looking for a query in oracle to list out all tables where the employee_name column = 'person_name' and for date > 'sample_date'. is this possible ?
As you said - dynamic SQL helps. For example, based on Scott's sample schema, I'm searching for a table that contains both ENAME and HIREDATE columns with desired values (SCOTT and 09.12.1982 (dd.mm.yyyy)).
SQL> set serveroutput on
SQL>
SQL> DECLARE
2 l_str VARCHAR2(500);
3 l_cnt NUMBER := 0;
4 BEGIN
5 FOR cur_r IN (SELECT t.table_name, u1.column_name col1, u2.column_name col2
6 FROM user_tables t join user_tab_columns u1 on u1.table_name = t.table_name
7 join user_tab_columns u2 on u2.table_name = t.table_name
8 WHERE u1.column_name = 'ENAME'
9 AND u2.column_name = 'HIREDATE'
10 )
11 LOOP
12 l_str := 'SELECT COUNT(*) FROM ' || cur_r.table_name ||
13 ' WHERE ' || cur_r.col1 || ' = ''SCOTT''' ||
14 ' AND ' || cur_r.col2 || ' = date ''1982-12-09''';
15
16 EXECUTE IMMEDIATE (l_str) INTO l_cnt;
17
18 IF l_cnt > 0 THEN
19 dbms_output.put_line(l_cnt ||' row(s) in ' || cur_r.table_name);
20 END IF;
21 END LOOP;
22 END;
23 /
1 row(s) in EMP
PL/SQL procedure successfully completed.
SQL>
Related
This question already has answers here:
Search All Fields In All Tables For A Specific Value (Oracle)
(17 answers)
Closed 8 months ago.
Is there SQL to Search for a particular VALUE in all COLUMNS of all TABLES in an entire SCHEMA in Oracle DB. Please explain.
You'll need dynamic SQL, as you have to compose select statement.
Here's an example; adjust it according to your needs because datatypes matter (e.g. you can't compare numbers to dates and such; I'm handling it simply by skipping over errors):
SQL> declare
2 l_search_value varchar2(20) := '10';
3 l_str varchar2(500);
4 l_cnt number;
5 begin
6 for cur_r in (select table_name, column_name, data_type
7 from user_tab_columns
8 )
9 loop
10 begin
11 l_str := 'select count(*) from ' || cur_r.table_name ||
12 ' where ' || cur_r.column_name || ' = ' || l_search_value;
13 execute immediate l_str into l_cnt;
14
15 if l_cnt > 0 then
16 dbms_output.put_line(rpad(cur_r.table_name ||'.'||cur_r.column_name, 30, ' ') ||
17 ' found ' || l_cnt || ' time(s)');
18 end if;
19
20 exception
21 when others then
22 --dbms_output.put_line(rpad(cur_r.table_name ||'.'||cur_r.column_name, 30, ' ')
23 -- ||' - ' || cur_r.data_type ||'; '|| sqlerrm);
24 null;
25 end;
26 end loop;
27 end;
28 /
DEPARTMENTS.DEPARTMENT_ID found 1 time(s)
DEPT.DEPTNO found 1 time(s)
EMP.DEPTNO found 3 time(s)
EMPLOYEES.DEPARTMENT_ID found 3 time(s)
PL/SQL procedure successfully completed.
SQL>
In SQL Oracle, is there a way to filter an ALL_TAB_COLUMNS SELECT statement, by the values in a specific column?
Yes; you'll need PL/SQL with dynamic SQL to do that.
Here's an example I use to search through current user's tables, check the ones that contain ENAME column which contains SCOTT string within. The result says that two tables (EMPLOYEE and EMP) contain one row with such a value.
Adjust it to your needs.
SQL> SET SERVEROUTPUT ON
SQL> DECLARE
2 l_str VARCHAR2(500);
3 l_cnt NUMBER := 0;
4 BEGIN
5 FOR cur_r IN (SELECT u.table_name, u.column_name
6 FROM user_tab_columns u, user_tables t
7 WHERE u.table_name = t.table_name
8 AND u.column_name = 'ENAME'
9 )
10 LOOP
11 l_str := 'SELECT COUNT(*) FROM ' || cur_r.table_name ||
12 ' WHERE ' || cur_r.column_name || ' like (''%SCOTT%'')';
13
14 EXECUTE IMMEDIATE (l_str) INTO l_cnt;
15
16 IF l_cnt > 0 THEN
17 dbms_output.put_line(l_cnt ||' : ' || cur_r.table_name);
18 END IF;
19 END LOOP;
20 END;
21 /
1 : EMPLOYEE
1 : EMP
PL/SQL procedure successfully completed.
SQL>
select table_name
from user_tab_columns
where column_name IN ('EMP_NAME');
This query gives around 150 table names. I want to find all the tables that has column "EMP_NAME" = ABC and delete it. How do I fetch all the tables that has value on the column "EMP_NAME" = ABC ?
For example: I'll create emp_temp table and modify one of its rows so that its ENAME column contains LITTLEFOOT - that's what I want to remove.
SQL> create table emp_temp as select * from emp;
Table created.
SQL> update emp_temp set ename = 'LITTLEFOOT' where ename = 'KING';
1 row updated.
Let's do it:
SQL> set serveroutput on
SQL> declare
2 l_str varchar2(500);
3 l_cnt number := 0;
4 begin
5 for cur_r in (select u.table_name, u.column_name
6 from user_tab_columns u, user_tables t
7 where u.table_name = t.table_name
8 and u.column_name = 'ENAME'
9 )
10 loop
11 l_str := 'SELECT COUNT(*) FROM ' || cur_r.table_name ||
12 ' WHERE ' || cur_r.column_name || ' = ''LITTLEFOOT''';
13
14 execute immediate (l_str) into l_cnt;
15
16 if l_cnt > 0 then
17 dbms_output.put_line(l_cnt ||' : ' || cur_r.table_name);
18 execute immediate 'delete from ' || cur_r.table_name ||
19 ' where ' ||cur_r.column_name || ' = ''LITTLEFOOT''';
20 end if;
21 end loop;
22 end;
23 /
1 : EMP_TEMP
PL/SQL procedure successfully completed.
SQL> select * From emp_temp where ename = 'LITTLEFOOT';
no rows selected
SQL>
Apparently, I've been deleted. Terminated. But I'll be back.
You may loop over all tables returned from the query (using the cursor):
select table_name
from user_tab_columns
where column_name IN ('EMP_NAME');
and use execute immediate to perform delete:
execute immediate 'DELETE from ' || table_name || ' where EMP_NAME='''ABC'''
full example:
for i in (
select distinct table_name
from user_tab_columns
where column_name IN ('EMP_NAME')
) LOOP
execute immediate 'DELETE from ' || i.table_name || ' where EMP_NAME='''ABC''';
END LOOP;
I have to update all the tables having column name like '%DIV%' with a value DD wherever it is MG , I have written the script for it , but I am not getting the idea of how to verify if columns of all the tables are updated to value DD after the activity is performed. I have written this query .
SELECT 'SELECT '||OWNER||'.'||TABLE_NAME||', '||COLUMN_NAME||' FROM '||OWNER||'.'||TABLE_NAME||' WHERE '||COLUMN_NAME||' = ''MG'' ;'
FROM RADHA.CHANGE_TABLE
WHERE VALID_FLAG='Y'
I was planning to make a table structure like
OWNER TABLE_NAME PREV_COUNT
The PREV_COUNT will hold the count of rows having Column Value as MG and after the activity is performed , I will verify with following query if the corresponding rows have been updated to DD .
SELECT 'SELECT '||OWNER||'.'||TABLE_NAME||', '||COLUMN_NAME||' FROM '||OWNER||'.'||TABLE_NAME||' WHERE '||COLUMN_NAME||' = ''DD'' ;' FROM RADHA.CHANGE_TABLE WHERE VALID_FLAG='Y'
And the output of this query would go into table
OWNER TABLE_NAME NEW_COUNT
But I am not able to get how to fetch records from the Select query as it is the string which is written inside the select query but I want the result set such that I can insert the records in my table mentioned above, please guide how to approach further
I don't have your tables, but - based on Scott's sample schema, here's a script which search through all its tables for a column named JOB (line #8) and checks how many of them have value that looks like (hint: like) CLERK in it (line #12).
See how it works, adjust it so that it works for you.
SQL> DECLARE
2 l_str VARCHAR2(500);
3 l_cnt NUMBER := 0;
4 BEGIN
5 FOR cur_r IN (SELECT u.table_name, u.column_name
6 FROM user_tab_columns u, user_tables t
7 WHERE u.table_name = t.table_name
8 AND u.column_name = 'JOB'
9 )
10 LOOP
11 l_str := 'SELECT COUNT(*) FROM ' || cur_r.table_name ||
12 ' WHERE ' || cur_r.column_name || ' like (''%CLERK%'')';
13
14 EXECUTE IMMEDIATE (l_str) INTO l_cnt;
15
16 IF l_cnt > 0 THEN
17 dbms_output.put_line(l_cnt ||' : ' || cur_r.table_name);
18 END IF;
19 END LOOP;
20 END;
21 /
4 : EMP --> there are 4 CLERKs in the EMP table
PL/SQL procedure successfully completed.
SQL>
I'm try to loop some tables and run select as below:
set serveroutput on
declare
type tables_names is table of varchar2(30);
type selectTable is table of varchar2(30);
tName tables_names;
sTableName selectTable;
begin;
tName := tables_names('PERIOD','SETTING','RAP','LOG');
sTableName := selectTable('m_table1','m_table2','m_table3','m_table4','m_table5');
for i in 1..tName.count loop
for j in 1..sTableName.count loop
select col10, count(*) from user.sTableName(j)
where table_name = tName(i) group by col10;
end loop;
end loop;
end;
I got error:PL/SQL: ORA-00933.
Can you please tell me how can I correctly run PL/SQL procedure to have displayed result from my select?
UPDATE: looking result
Normally, to get this I need to run below select's:
select column_name,
count(*) as countColumn
from user.m_table1 where table_name = 'PERIOD' group by column_name;
select column_name,
count(*) as countColumn
from user.m_table2 where table_name = 'PERIOD' group by column_name;
Oracle complains (ORA-00933) that command isn't properly ended. That's probably because of a semi-colon behind the BEGIN; also, you lack the INTO clause.
I'm not sure what PERIOD, SETTING, ... are opposed to m_table1, m_table2, ... Which ones of those are table names? What are those other values, then?
Anyway: here's an example which shows how to do something like that - counting rows from tables. Try to adjust it to your situation, or - possibly - add some more info so that we'd know what you are doing.
SQL> set serveroutput on
SQL> declare
2 tname sys.odcivarchar2list := sys.odcivarchar2list();
3 l_cnt number;
4 l_str varchar2(200);
5 begin
6 tname := sys.odcivarchar2list('EMP', 'DEPT');
7
8 for i in 1 .. tname.count loop
9 l_str := 'select count(*) from ' || tname(i);
10 execute immediate l_str into l_cnt;
11 dbms_output.put_line(tname(i) ||': '|| l_cnt);
12 end loop;
13 end;
14 /
EMP: 14
DEPT: 4
PL/SQL procedure successfully completed.
SQL>
[EDIT: added GROUP BY option]
Here you go; as EMP and DEPT share the DEPTNO column, I chose it for a GROUP BY column.
SQL> declare
2 tname sys.odcivarchar2list := sys.odcivarchar2list();
3 type t_job is record (deptno varchar2(20), cnt number);
4 type t_tjob is table of t_job;
5 l_tjob t_tjob := t_tjob();
6 l_str varchar2(200);
7 begin
8 tname := sys.odcivarchar2list('EMP', 'DEPT');
9
10 for i in 1 .. tname.count loop
11 l_str := 'select deptno, count(*) from ' || tname(i) ||' group by deptno';
12 execute immediate l_str bulk collect into l_tjob;
13
14 for j in l_tjob.first .. l_tjob.last loop
15 dbms_output.put_Line('Table ' || tname(i) || ': Deptno ' || l_tjob(j).deptno||
16 ': number of rows = '|| l_tjob(j).cnt);
17 end loop;
18
19 end loop;
20 end;
21 /
Table EMP: Deptno 30: number of rows = 6
Table EMP: Deptno 20: number of rows = 5
Table EMP: Deptno 10: number of rows = 3
Table DEPT: Deptno 10: number of rows = 1
Table DEPT: Deptno 20: number of rows = 1
Table DEPT: Deptno 30: number of rows = 1
Table DEPT: Deptno 40: number of rows = 1
PL/SQL procedure successfully completed.
SQL>
You are probably looking for something like this. Note that you can't run a simple select statement inside a PL/SQL without INTO clause. use a refcursor and DBMS_SQL.RETURN_RESULT
DECLARE
TYPE tables_names IS TABLE OF VARCHAR2 (30);
TYPE selectTable IS TABLE OF VARCHAR2 (30);
tName tables_names;
sTableName selectTable;
rc SYS_REFCURSOR;
BEGIN
tName :=
tables_names ('PERIOD',
'SETTING',
'RAP',
'LOG');
sTableName :=
selectTable ('m_table1',
'm_table2',
'm_table3',
'm_table4',
'm_table5');
FOR i IN 1 .. tName.COUNT
LOOP
FOR j IN 1 .. sTableName.COUNT
LOOP
OPEN rc FOR
'select col10, count(*) from '||USER||'.'
|| sTableName (j)
|| ' where table_name = '''
|| tName (i)
|| ''' group by col10';
DBMS_SQL.RETURN_RESULT (rc);
END LOOP;
END LOOP;
END;
/