I have a problem with a simple script in sql:
SQL> alter table myTable modify myColumn default 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
SP2-0027: Input is too long (> 2499 characters) - line ignored
Split the 4000-character long string literal into two parts after 2000 characters and concatenate the two strings together:
SQL> alter table myTable modify myColumn default 'XXXXXX...........XXXXXX' ||
2 'XXXXXX.............XXXXXX';
(I've omitted most of the Xs here for clarity.)
However, if you genuinely have 4000 Xs , it's simpler to write
SQL> alter table myTable modify myColumn default rpad('X', 4000, 'X');
Related
I have a number that needs to be formatted like this:
Thousands need to be separated with .
Decimals need to be separated with ,
For example, number 1,234,567.89 needs to look like 1.234.567,89.
Is there any way that I can do this with a simple sql function or I have to make my own function?
Use to_char() together with the specification that you want to use , as the decimal separator and . for the thousands separator (which is not the default in Oracle)
select to_char(1234567.89, '9G999G999G999D00', 'NLS_NUMERIC_CHARACTERS = '',.''')
from dual;
Results in: 1.234.567,89
Details about format models: http://docs.oracle.com/cd/E11882_01/server.112/e41084/sql_elements004.htm#SQLRF00211
Details about the to_char() function: http://docs.oracle.com/cd/E11882_01/server.112/e41084/functions201.htm#SQLRF51882
You can alternatively also work with the session territory setting.
create table mytest (field1 number);
insert into mytest values (1234567.89);
alter session set NLS_TERRITORY=GERMANY;
select field1, to_char(field1,'9G999G999G999D00') from mytest;
alter session set NLS_TERRITORY=AMERICA;
select field1, to_char(field1,'9G999G999G999D00') from mytest;
Output:
Table created.
1 row created.
Session altered.
FIELD1 TO_CHAR(FIELD1,'9G999G999G999D00')
---------- ----------------------------------
1234567,89 1.234.567,89
1 row selected.
Session altered.
FIELD1 TO_CHAR(FIELD1,'9G999G999G999D00')
---------- ----------------------------------
1234567.89 1,234,567.89
1 row selected.
As we all know LONG is deprecated in Oracle a long back but Oracle itself is still using this datatype in their views.
So if I have to change LONG into some kind of text datatype how can I achieve that.
I am trying to query this and getting error.
ORA-00932: inconsistent datatypes: expected - got LONG
Query -
SELECT NVL(ie.column_expression, ic.column_name)
from user_ind_columns ic left join user_ind_expressions ie on ic.index_name = ie.index_name and ic.table_name = ie.table_name
where ic.table_name = 'Some Table'
There are several methods, one such is create table using TO_LOB. It is designed to convert a LONG or LONG RAW column to a CLOB or BLOB, respectively. Other methods are using PL/SQL, DBMS_XMLGEN. You can also use TO_LOB in insert statements.
Let's see how to convert LONG into CLOB-
SQL> CREATE TABLE t (x INT, y LONG);
Table created.
SQL>
SQL> INSERT INTO t VALUES (1, RPAD('*',9,'!'));
1 row created.
SQL> INSERT INTO t VALUES (2, RPAD('*',9,'#'));
1 row created.
SQL> INSERT INTO t VALUES (3, RPAD('*',9,'#'));
1 row created.
SQL> COMMIT;
Commit complete.
SQL>
So, we have table t with column y s LONG data type.
SQL> CREATE TABLE t1
2 AS
3 SELECT * FROM t
4 /
SELECT * FROM t
*
ERROR at line 3:
ORA-00997: illegal use of LONG datatype
SQL>
We can see the LONG restriction.
Let's use TO_LOB to convert it into CLOB.
SQL> CREATE TABLE t1
2 AS
3 SELECT x,
4 to_lob(y) as y
5 FROM t
6 /
Table created.
SQL> desc t1;
Name Null? Type
----------------------------------------------------- -------- ------------------------------------
X NUMBER(38)
Y CLOB
SQL>
Now you have the same table with the LONG column converted to CLOB.
this is stupid (as in probably not efficient) but it works for samll lengths of y (ie < 2000 characters)..
CREATE TABLE t (x INT, y LONG);
INSERT INTO t VALUES (1, RPAD('*',9,'!'));
CREATE TABLE t1
AS
SELECT x,
regexp_substr(SYS.DBMS_XMLGEN.GETXML('select y from t where rowid = '''||rowid||''''),'<Y>(.*)</Y>',1,1,'in',1) y
FROM t
/
it works by using dbms_xmlgen to generate a clob based on the LONG column.. then substr-ing the value back out.
this only works for small contents of the LONG column. but that is all i had and this worked for me.
I had a similar need, to list the objects and their sizes (including info on columns used in indexes), and came with this solution:
select idx1.table_owner owner, idx1.table_name, idx1.index_name, listagg(nvl(idx1.column_expression,idx1.column_name),',') within group (order by idx1.column_position) column_name
from xmltable(
'/ROWSET/ROW'
passing (select dbms_xmlgen.getxmltype('select ic.table_owner, ic.table_name, ic.index_name, ic.column_position, ic.column_name, ie.column_expression
from all_ind_columns ic
left outer join dba_ind_expressions ie on ie.table_owner=ic.table_owner and ie.table_name=ic.table_name and ie.index_name=ic.index_name and ie.column_position=ic.column_position') from dual)
columns index_name varchar2(30) path 'INDEX_NAME'
, table_owner varchar2(30) path 'TABLE_OWNER'
, table_name varchar2(30) path 'TABLE_NAME'
, column_position number path 'COLUMN_POSITION'
, column_name varchar2(30) path 'COLUMN_NAME'
, column_expression varchar2(4000) path 'COLUMN_EXPRESSION') idx1
group by idx1.table_owner, idx1.table_name, idx1.index_name
Background:
I want to change a table column from Long to Clob.
I am not allowed to create/alter tablespaces
The table has 10M + rows
What i have tried:
Simply alter table from long to clob:
returns full tablespace error - ORA-01652: "unable to extend temp segment by %s in tablespace %s"
Export data from table and insert in a new table:
export just takes too long, at the speed its going now, it will take weeks to export.
Running "insert /*+ APPEND */ into new_table select * from old_table;"
returns an error - ORA-00997: "illegal use of LONG datatype"
Just an alternative. (Always test in preproduction before)
Create a function that casts long to clob.
Then try your third option using the function:
insert /*+ APPEND */ into new_table select id, long_to_clob(myLob) as myclob from old_table;
Drop the long field.
Add a new clob field.
Update the new field.
UPDATE old_table o
SET new_field =( SELECT myclob FROM newTable n WHERE n.id = o.id)
WHERE 1=1;
I'm having trouble executing a simple query such as the following
select * from table_name where variabe_name like '在职'
the problem is the chinese chars. Those chars are in the table (I just copied them after doing a select * from table, so the displaying of the chinese chars works just fine) but it doesn't seem to work. When it execute the query, it returns 0 rows.
I' ve also tried
select * from table_name where variabe_name like '%在职%'
and
select * from table_name where variabe_name = '在职'
But that doesn't work either.
Any clue of what the problem might be?
Thnaks a lot
==> Found solution: put 'N' before the chinese characters, so that they are interpreted as Unicode. Like: where field like N'罐'
SQL> create table mytbl (data_col varchar2(200));
Table created
SQL> insert into mytbl values('在职');
1 row inserted.
SQL> commit;
Commit complete.
SQL> select * from mytbl where data_col like '%在职%';
DATA_COL
-----------
在职
SQL> SELECT * FROM nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
------------------------------ ----------------------------------------
NLS_CHARACTERSET AL32UTF8
Your NLS_CHARACTERSET should be set to AL32UTF8. So try
SQL> ALTER SESSION SET NLS_CHARACTERSET = 'AL32UTF8';
Also make sure that parameter NLS_NCHAR_CHARACTERSET is set to UTF8.
SQL> ALTER SESSION SET NLS_NCHAR_CHARACTERSET = 'UTF8';
I'm trying to run a query that has a few columns that are a CLOB datatype. If i run the query like normal, all of those fields just have (CLOB) as the value.
I tried using DBMS_LOB.substr(column) and i get the error
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
How can i query the CLOB column?
This works
select DBMS_LOB.substr(myColumn, 3000) from myTable
When getting the substring of a CLOB column and using a query tool that has size/buffer restrictions sometimes you would need to set the BUFFER to a larger size. For example while using SQL Plus use the SET BUFFER 10000 to set it to 10000 as the default is 4000.
Running the DBMS_LOB.substr command you can also specify the amount of characters you want to return and the offset from which. So using DBMS_LOB.substr(column, 3000) might restrict it to a small enough amount for the buffer.
See oracle documentation for more info on the substr command
DBMS_LOB.SUBSTR (
lob_loc IN CLOB CHARACTER SET ANY_CS,
amount IN INTEGER := 32767,
offset IN INTEGER := 1)
RETURN VARCHAR2 CHARACTER SET lob_loc%CHARSET;
I did run into another condition with HugeClob in my Oracle database. The dbms_lob.substr only allowed a value of 4000 in the function, ex:
dbms_lob.substr(column,4000,1)
so for my HughClob which was larger, I had to use two calls in select:
select dbms_lob.substr(column,4000,1) part1,
dbms_lob.substr(column,4000,4001) part2 from .....
I was calling from a Java app so I simply concatenated part1 and part2 and sent as a email.
If it's a CLOB why can't we to_char the column and then search normally ?
Create a table
CREATE TABLE MY_TABLE(Id integer PRIMARY KEY, Name varchar2(20), message clob);
Create few records in this table
INSERT INTO MY_TABLE VALUES(1,'Tom','Hi This is Row one');
INSERT INTO MY_TABLE VALUES(2,'Lucy', 'Hi This is Row two');
INSERT INTO MY_TABLE VALUES(3,'Frank', 'Hi This is Row three');
INSERT INTO MY_TABLE VALUES(4,'Jane', 'Hi This is Row four');
INSERT INTO MY_TABLE VALUES(5,'Robert', 'Hi This is Row five');
COMMIT;
Search in the clob column
SELECT * FROM MY_TABLE where to_char(message) like '%e%';
Results
ID NAME MESSAGE
===============================
1 Tom Hi This is Row one
3 Frank Hi This is Row three
5 Robert Hi This is Row five
For big CLOB selects also can be used:
SELECT dbms_lob.substr( column_name, dbms_lob.getlength(column_name), 1) FROM foo
Another option is to create a function and call that function everytime you need to select clob column.
create or replace function clob_to_char_func
(clob_column in CLOB,
for_how_many_bytes in NUMBER,
from_which_byte in NUMBER)
return VARCHAR2
is
begin
Return substrb(dbms_lob.substr(clob_column
,for_how_many_bytes
,from_which_byte)
,1
,for_how_many_bytes);
end;
and call that function as;
SELECT tocharvalue, clob_to_char_func(tocharvalue, 1, 9999)
FROM (SELECT clob_column AS tocharvalue FROM table_name);
To add to the answer.
declare
v_result clob;
begin
---- some operation on v_result
dbms_lob.substr( v_result, 4000 ,length(v_result) - 3999 );
end;
/
In dbms_lob.substr
first parameter is clob which you want to extract .
Second parameter is how much length of clob you want to extract.
Third parameter is from which word you want to extract .
In above example i know my clob size is more than 50000 , so i want last 4000 character .
If you are using SQL*Plus try the following...
set long 8000
select ...