How to tell a select statement to ignore a clue?
Dear all,I have a large query that uses many clues, but when I create a new index on the table, accessed by the query, the query will try to use this additional index and so it performs badly. Can you tell me how to tell this query to ignore this clue, because I need the index in other queries and I can't let it go.
Concerning
Wassim
You can also use the NO_INDEX hint.
/ * + NO_INDEX (
This trick will force the optimizer to ignore the index named when it formulates the plan. Karen
Tags: Database
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Hai All
I have two tables namely Daily_attend, Train_mast
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Srikkanth.MSrikkanth,
Try this code. And 1 thing, I don't see any WHERE condition to join between the 2 tables, DAIL_ATT, TRAIN_MAST.
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); Kind regards
Manu.
If my answer or the answer to another person has been useful or appropriate, please mark accordingly
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---------- -------------------- ----------
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SY.
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Commission of the CARDS
0-20 0
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26-31 650
32-36 850
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Something like that...
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Hello
2726057 wrote:
... There is a column called entity that can store a value i.e. project or request. ...
In which table is this column? Assuming that it is in a table called entity_table, you can do something like this:
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project name AS the name
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WHEN THERE IS)
SELECT 1
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)
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SELECT 1
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)
;
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I hope that answers your question.
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Explain, using specific examples, how you get these results from these data.
Always say what version of Oracle you are using (for example, 11.2.0.2.0).
See the FAQ forum: https://forums.oracle.com/message/9362002#9362002
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CREATE OR REPLACE FUNCTION IN_SCHEMA.IS_YDAYDATA_TO_TABLE
(
in_schema IN VARCHAR2,
in_tablename IN VARCHAR2,
in_datefield IN VARCHAR2,
)
RETURNS INTEGER
AS
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v_is_true INTEGER.
BEGIN
SELECT
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THEN 1
ON THE OTHER
0
END
IN
v_is_true
Of
in_schema.in_tablename
;
RETURN v_is_true;
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How to use the values of the input variables on the table select statement names?
Hello
Here's a way you can use dynamic SQL statements for this task:
CREATE OR REPLACE FUNCTION IS_YDAYDATA_TO_TABLE
(
in_schema IN VARCHAR2,
in_tablename IN VARCHAR2,
in_datefield IN VARCHAR2,
in_first_date DATE DEFAULT SYSDATE - 1,.
in_last_date DATE by DEFAULT NULL
)
RETURNS INTEGER
AS
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- and it returns 0 if there is no such lines.
-If in_last_date is omitted, the search only the data on in_first_date.
-If in_first_date is omitted, it defaults to yesterday.
-Time parts of the in_first_date and in_last_date are ignored.
-Declaring variables
sql_txt VARCHAR2 (1000);
v_is_true INTEGER.
BEGIN
sql_txt: = 'SELECT COUNT (*).
|| 'FROM ' | in_schema | '.' || in_tablename
|| 'WHERE ' | in_datefield | ' > =: d1'
|| «AND» | in_datefield | '< > >
|| 'AND ROWNUM = 1';
dbms_output.put_line (sql_txt |) '= sql_txt in IS_YDAYDATA_TO_TABLE"); -For debugging
Sql_txt EXECUTE IMMEDIATE
IN v_is_true
With the HELP of TRUNC (in_first_date) - d1
TRUNC (NVL (in_last_date
in_first_date
)
) + 1 -- d2
;
RETURN v_is_true;
END is_ydaydata_to_table;
/
DISPLAY ERRORS
If you must use dynamic SQL statements, put all the SQL statement in a single string variable, such as sql_txt in the example above. In this way, you can easily see exactly what will be executed. Comment out the call to dbms_output under test is completed.
Try to write functions that will address not only the question that you have now, but similar questions that you may have in the future. For example, now that interest you only to the verification of the data of yesterday, but later, you might want to check another day or range of days. The above function combines the convenience of a function simple (looks like yesterday data if you don't tell him otherwise) with the power of a more complex function (you can use the same function to check any day or range of days).
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