I am running the following query, but no rows are returned even though a record exists that should match the query.
SELECT
*
FROM
tblsignup
WHERE
usr_email='amir#gmail.com'
AND
(status=1 or status=2)
You should try by simplifying the query (yeah...even if it's so simple)
try this
Select * from tblsignup
then
Select * from tblsignup where
usr_email = 'amir#gmail.com'
then
Select * from tblsignup where
usr_email='amir#gmail.com' and
status > 0
//I know you won't use > 0 at the end, but we want to eliminate the most cause of error we simplify by > 0 only to be easier to read
Tell us from where you start getting 0 line, this could lead us to the problem, I know I already had a problem like that with a field named "date", because date is already used by MySQL, funny MySQL still let me use that fieldname tho.
Try this:
select * from `tblsignup` where `usr_email`='amir#gmail.com' and (`status`=1 or `status`=2)
I have a feeling "status" might be reserved for something special. It might be worth a shot changing it to `status`.
Try wrapping brackets around the status column name:
SELECT *
FROM tblsignup
WHERE usr_email = 'amir#gmail.com'
AND ([status] = 1
OR [status] = 2);
EDIT
After reading your comment, why not use:
SELECT *
FROM tblsignup
WHERE usr_email = 'amir#gmail.com'
AND [status] > 0;
May it be that your column or table has case sensitive collation and the address is typed different ('Amir...')? As your query is correct SQL. You can find that with:
EXEC sp_help DatabaseName
Related
I've seen may answers to the same kind of question but I still doubt.
UPDATE in SQL should be something like :
UPDATE *Table*
SET *choose value*
WHERE *what do we change*
I would like to know if there is possibilites to use a select instead of TABLE (an so instead of WHERE)
Like
UPDATE *Select conditions and rows*
SET *What do we change (the where is implicit)
I know UPDATE/SET/WHERE works well, but I'm exploring other possibilites :)
Thanks,
Nicolas
EXAMPLE :
Have to do :
update produits
set `NO_FOURNISSEUR` = "30"
where `NO_FOURNISSEUR` = "3"
would like to try something like :
update select * from produits where produits.`no_fournisseur`= "30"
set `NO_FOURNISSEUR`= "3"
MariaDB has a with expression, like so:
https://mariadb.com/kb/en/library/with/
so you would have:
WITH t AS (
select *
from produits
where produits.no_fournisseur= '30')
UPDATE t SET t.no_fournisseur = '3';
Yes. The ANSI SQL standard way to do this is using a Common Table Expression:
with dt as
(
select *
from produits
where produits.no_fournisseur= '30'
)
update dt set NO_FOURNISSEUR = '3'
This standard syntax supports joins and other query constructs in the SELECT part, and gives you a simple way to examine the rows before applying the update.
I am working on a web app and there are some long winded stored procedures and just trying to figure something out, I have extracted this part of the stored proc, but cant get it to work. The guy who did this is creating alias after alias.. and I just want to get a section to work it out. Its complaining about the ending but all the curly brackets seem to match. Thanks in advance..
FInputs is another stored procedure.. the whole thing is referred to as BASE.. the result of this was being put in a temp table where its all referred to as U. I am trying to break it down into separate sections.
;WITH Base AS
(
SELECT
*
FROM F_Inputs(1,1,100021)
),
U AS
(
SELECT
ISNULL(q.CoverPK,r.CoverPK) AS CoverPK,
OneLine,
InputPK,
ISNULL(q.InputName,r.InputName) AS InputName,
InputOrdinal,
InputType,
ParentPK,
InputTriggerFK,
ISNULL(q.InputString,r.InputString) AS InputString,
PageNo,
r.RatePK,
RateName,
Rate,
Threshold,
ISNULL(q.Excess,r.Excess) AS Excess,
RateLabel,
RateTip,
Refer,
DivBy,
RateOrdinal,
RateBW,
ngRequired,
ISNULL(q.RateValue,r.RateValue) AS RateValue,
ngClass,
ngPattern,
UnitType,
TableChildren,
TableFirstColumn,
parentRatePK,
listRatePK,
NewParentBW,
NewChildBW,
ISNULL(q.SumInsured,0) AS SumInsured,
ISNULL(q.NoItems,0) AS NoItems,
DisplayBW,
ReturnBW,
StringBW,
r.lblSumInsured,
lblNumber,
SubRateHeading,
TrigSubHeadings,
ISNULL(q.RateTypeFK,r.RateTypeFK) AS RateTypeFK,
0 AS ListNo,
0 AS ListOrdinal,
InputSelectedPK,
InputVis,
CASE
WHEN ISNULL(NewChildBW,0) = 0
THEN 1
WHEN q.RatePK is NOT null
THEN 1
ELSE RateVis
END AS RateVis,
RateStatus,
DiscountFirstRate,
DiscountSubsequentRate,
CoverCalcFK,
TradeFilter,
ngDisabled,
RateGroup,
SectionNo
FROM BASE R
LEFT JOIN QuoteInputs Q
ON q.RatePK = r.RatePK
AND q.ListNo = 0
AND q.QuoteId = 100021 )
Well, I explained the issue in the comments section already. I'm doing it here again, so future readers find the answer more easily.
A WITH clause is part of a query. It creates a view on-the-fly, e.g.:
with toys as (select * from products where type = 'toys') select * from toys;
Without the query at the end, the statement is invalid (and would not make much sense anyhow; if one wanted a permanent view for later use, one would use CREATE VIEW instead).
I'm trying to get the last record from this query but i don't know how to do it. I used ROW_NUMBER but my program (Protheus ADVPL) don't have resources to get the last line from a query
SELECT ROW_NUMBER() OVER (ORDER BY B1_MASTER, B1_COD) AS ID,
B1_COD,
B1_DESC,
B1_CATEG,
B1_MASTER,
A2_COMPRAD,
ISNULL((SELECT Sum(C6_QTDVEN * C6_PRCVEN)
FROM SC6010 SC6,
SF4010 SF4,
SC5010 SC5
WHERE C6_FILIAL = '01'
AND C6_PRODUTO = B1_COD
AND SC6.D_E_L_E_T_ <> '*'
AND C5_FILIAL = C6_FILIAL
AND C5_NUM = C6_NUM
AND C5_EMISSAO BETWEEN '20160401' AND '20160404'
AND C5_TIPO = 'N'
AND C5_MODAL = '2'
AND SC5.D_E_L_E_T_ <> '*'
(query have 106 lines so i ll not put everything)
I need the total records in a column, like this:
Tabela
What can i do?
Tks
You can use MAX(field) too.
But, you're using ADVPL, so you could use dbSeek instead to find the last RECNO.
So, using "work area" you can find the last record with this:
TRB->(RECCOUNT())
I changed ROW_NUMBER to ##ROWCOUNT and it works! Tks all
In languages such as JavaScript you can have 2 conditional statements and "protect" the second one with the first one. For instance:
if( scarryObject != null && scarryObject.scarryMethod() ) { ... }
// if scarryObject is null scarryMethod will not be called
I thought I would achieve the same in SQL like so:
where int_date > 19500101
and month(CONVERT(smalldatetime, ... int_date))
The problem here is that if int_date is some "bad" value like -1, 0, 1 the conversion will fail and the sp will stop with an error. I thought the first check int_date > 19500101 would get evaluated first and if false the second condition would be skipped.
It seems like it does not work like this... or? Is there any other way of doing this?
Thanks!
Your query is syntactically not correct, as the clausemonth(CONVERT.... is not a condition.
Let's assume you want to compare with a certain number, a possible way of expressing what you want would be
SELECT *
FROM myTable
WHERE case
when int_date > 19500101
then -1
else month(CONVERT(smalldatetime, ... int_date))
end = #YourMonth
You would 'protect' the evaluation of the 'month' and not the condition.
You could try splitting the query into two. Here is the concept:
SELECT *
FROM (
SELECT *
FROM myTable
WHERE int_date > 19500101
) t
WHERE month(CONVERT(smalldatetime, ... t.int_date))
In MySQL, is there a way to set the "total" fields to zero if they are NULL?
Here is what I have:
SELECT uo.order_id, uo.order_total, uo.order_status,
(SELECT SUM(uop.price * uop.qty)
FROM uc_order_products uop
WHERE uo.order_id = uop.order_id
) AS products_subtotal,
(SELECT SUM(upr.amount)
FROM uc_payment_receipts upr
WHERE uo.order_id = upr.order_id
) AS payment_received,
(SELECT SUM(uoli.amount)
FROM uc_order_line_items uoli
WHERE uo.order_id = uoli.order_id
) AS line_item_subtotal
FROM uc_orders uo
WHERE uo.order_status NOT IN ("future", "canceled")
AND uo.uid = 4172;
The data comes out fine, except the NULL fields should be 0.
How can I return 0 for NULL in MySQL?
Use IFNULL:
IFNULL(expr1, 0)
From the documentation:
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
You can use coalesce(column_name,0) instead of just column_name. The coalesce function returns the first non-NULL value in the list.
I should mention that per-row functions like this are usually problematic for scalability. If you think your database may get to be a decent size, it's often better to use extra columns and triggers to move the cost from the select to the insert/update.
This amortises the cost assuming your database is read more often than written (and most of them are).
None of the above answers were complete for me.
If your field is named field, so the selector should be the following one:
IFNULL(`field`,0) AS field
For example in a SELECT query:
SELECT IFNULL(`field`,0) AS field, `otherfield` FROM `mytable`
Hope this can help someone to not waste time.
You can try something like this
IFNULL(NULLIF(X, '' ), 0)
Attribute X is assumed to be empty if it is an empty String, so after that you can declare as a zero instead of last value. In another case, it would remain its original value.
Anyway, just to give another way to do that.
Yes IFNULL function will be working to achieve your desired result.
SELECT uo.order_id, uo.order_total, uo.order_status,
(SELECT IFNULL(SUM(uop.price * uop.qty),0)
FROM uc_order_products uop
WHERE uo.order_id = uop.order_id
) AS products_subtotal,
(SELECT IFNULL(SUM(upr.amount),0)
FROM uc_payment_receipts upr
WHERE uo.order_id = upr.order_id
) AS payment_received,
(SELECT IFNULL(SUM(uoli.amount),0)
FROM uc_order_line_items uoli
WHERE uo.order_id = uoli.order_id
) AS line_item_subtotal
FROM uc_orders uo
WHERE uo.order_status NOT IN ("future", "canceled")
AND uo.uid = 4172;