i have a table which has 200 colums, i want to check if every single of this column has a value and skip them in my select query if they do not.
Not sure how to use select function in this example
Select * from A;
Related
When I query the Postgres DB with SELECT * FROM table2 WHERE empty IS NULL I get nothing, and I get all the rows when I use WHERE empty = ''.
It would seem then like Table Output will not convert your empties to nulls. Maybe you could convert nulls to empties exactly before the output.
Example:
select * from "Attendance_SwipeEffHrs" where "TimsyHrs" is null.
It shows 3 records. In other hand, if i use,
select * from "Attendance_SwipeEffHrs" where "TimsyHrs"=''.
It Shows 5 records. I did not insert empty records in the field. So how can i get all the records.
Insert into #Temp(Rownumber, Percentage)
select RowNumber,
(MatchFirstName.PercentMatch * FunctionWeights.FunctionWeight)
from dbo.MatchFirstName(#FirstName), dbo.FunctionWeights
where FunctionWeights.FunctionName = 'MatchFirstName'
In FunctionWeights table, I have weights column and FunctionName column that stores different function names.
dbo.MatchFirstName(#FirstName) is the TVF here. Now , I have a table called FunctionWeights that stores a constant value corresponding to these function names.
Before the value is inserted into Temp table in Percentage column, I want it to retrieve the constant value corresponding to the function name that select statement has and multiply it which percentage value which was retrieved from the function. How can I do this?
With above query, multiplied value is not retrieved in the percentage column of Temp table but only the PercentageMatch value from TVF.
SNAPSHOTS:
FunctionWeights Table
select * from #Temp after insert
The percentage column should have 100 multiplied by the value from FunctionWeights.FunctionWeight. But instead it has 100 in all columns.
Your FunctionWeight for MatchFirstoName is 1, so multiplying with it doesn't make any difference. If MatchFirstName returns 100 in PercentMatch then all rows will be 100.
If you have the fixed function names for the select, you could just fetch the FunctionWeight into a variable before the select.
May be you should give an alias to your TVF and use it to access the column from it, because the reference to the TVF in the from clause includes parameters for it where as the one in the Select clause doesn't.
Insert into #Temp(Rownumber, Percentage)
select RowNumber,
(T.PercentMatch * FunctionWeights.FunctionWeight)
from dbo.MatchFirstName(#FirstName) T, dbo.FunctionWeights
where FunctionWeights.FunctionName = 'MatchFirstName'
I have a SQL table with a 20 to 30 columns that I need to to search. I've set up the free text search so that I can run queries such as:
Select * from dbo.table1 where Contains(*,'asdf');
The problem is I don't know which column actually contains 'asdf' is there a straightforward way to get the specific column(s)?
EDIT
The result I'm looking for would be similar to the following:
Record Number | ColumnFoundIn
5 columnA
100 columnB
244 columnA
250 columnF
The original table has a unique record number for each row, so I would like the record number and then the column where 'asdf' was found.
I have a table which I dynamically fill with some data I want to create some statistics for. I have one value which has some values following a certain pattern, so I created an additional column where I map the values to other values so I can group them.
Now before I run my statistics, I need to check if I have to remap these values which means that I have to check if there are null values in that column.
I can do a select like this:
select distinct 1
from my-table t
where t.status_rd is not null
;
The disadvantage is, that this returns exactly one row, but it has to perform a full select. Is there some way that I can stop the select for the first encounter? I'm not interested in the exact row, because when there is at least one row, I have to run an update on all of them anyway, but I would like to avoid running the update unnecessarily everytime.
In Oracle I would do it with rownum, but this doesn't exist in SQLite
select 1
from my-table t
where t.status_rd is not null
and rownum <= 1
;
Use LIMIT 1 to select the first row returned:
SELECT 1
FROM my_table t
WHERE t.status_rd IS NULL
LIMIT 1
Note: I changed the where clause from IS NOT NULL to IS NULL based on your problem description. This may or may not be correct.
I want to write SQLite statement something like this:
SELECT * FROM Table WHERE RowNumber BETWEEN 1 AND 10;
but i don't have such column RowNumber. I have primary key in my table. But is there row number by default that i could use ?
Also i am searching info about writing more complicated SQLite statement. So if you have some links in bookmarks please share.
Thanks.
You want to use LIMIT and OFFSET
SELECT * FROM Table LIMIT 10 OFFSET 0
Which can also be expressed with the following shorthand syntax
SELECT * FROM Table LIMIT X,Y
Where X represents the offset, which is exclusive, and Y represents the quantity, so for example
SELECT * FROM Table LIMIT 50,50
Would return rows 51-100
The automatically-created rowid for a table can be accessed by a few different names. From the SQLite documentation:
Every row of every SQLite table has a 64-bit signed integer key that uniquely identifies the row within its table. This integer is usually called the "rowid". The rowid value can be accessed using one of the special case-independent names "rowid", "oid", or "_rowid_" in place of a column name.
SELECT * FROM Table WHERE ROWID BETWEEN 1 AND 10;