I have two tables in a PostgreSQL database.
The first table contains an ID and a text field with up to 200 characters and the second table contains a data definition table which has a column that contains smileys or acronyms and a second column which converts them to plain readable English.
The number of records in table 1 is about 1200 and the number in table two is about 300.
I wish to write a SQL statement which will convert any text speak in column 1 in table one into normal readable language based on the definitions in Table 2.
So for example if the value in table 1 reads as: Finally Finished :)
The transformed SQL would be something like: Finally Finished Smiles or smiling,
where the definition is pulled from the second table.
Note the smiley could be anywhere in the text in column one and could one of three hundred characters.
Does anyone know if this is possible?
Yes. Do you want to do it entirely in SQL, or are you writing a brief bit of code to do this? I'm not entirely sure of how to do it all in SQL but I would consider something like what is below:
SELECT row.textToTranslate FROM Table_1
oldText = row.textToTranslate
Split row.textToTranslate by some delimeter
For each word in row.textToTranslate:
queryResult = SELECT FROM Table_2 WHERE pretranslate=word
if(queryResult!=Null)
modifiedText = textToTranslate.replace(word, queryResult)
UPDATE Table_1 SET translatedText=modifiedText WHERE textToTranslate=oldText
Related
I have a table I wish to query. It has a string variable called comment which contains an ID along with other things. (i.e. "123456;varA;varB")
rowNo
comment
1
"123456;varA;varB"
2
"987654;varA;varB"
I want to filter based on the first substring in the comment variable.
That is, I want to filter the table on rows where the first substring of comment is "123456" (which in the example would return the first row)
How do I do this?
I was thinking something along the lines of the code below, using the "string_split" function, but it doesn't work.
SELECT *,
FROM table
WHERE (SELECT value FROM STRING_SPLIT(comment,';',1)="123456")
Does anyone have any ideas?
Note, I am querying in SQL in SAS, and this is on a large dataset, so I don't want to create a new table with a new column to then query on instead. Ideally I'd want to query on the existing table directly.
You can use the SCAN() function to parse a string.
WHERE '123456'=scan(comment,1,';')
I need to create a column name based on the value of other columns. I need to return a value from a column, but the specific name depends on the value insert on other table.
From intance:
Table A
Column1 | Column2
1 2
Base on that values I need to go to the table B to the column "VE12".
I need this dynamiclly, so the execute(#query) is my last option and I would like to avoid CASE WHEN statments because I have more than 50 options.
My query will be something like:
select case when fn.tab=8 and fo.pais=3 then cp.ve83 end
FROM fn
INNER JOIN fo ON fo.stamp = fn.stamp
INNER JOIN cp
If the value in the column tab is 8 and the value in column pais is 3 I should return the value in column ve83.
Thanks for all the help!
The only sensible option is to go back to the business meaning of the data and redesign the database according to that, instead of according to "technique-oriented abstractions" such as these that SQL was never intended to support.
The main reason for this is that SQL was founded on FIRST order logic, and this precludes supporting stuff like varying domains. Which you are doing (or at least seeking to do) because ve12 could be a DATETIME and ve83 could be a VARCHAR and ve56 coulb be a BLOB etc. etc. So there is just no way for you [or anyone else] to determine the data type of the results in your query, and it is even more impossible to attach meaning to what comes out of your desired query precisely because of this varying-domain and varying-source characteristic.
I would like to ask if it is possible to do this:
For example the search string is '009' -> (consider the digits as string)
is it possible to have a query that will return any occurrences of this on the database not considering the order.
for this example it will return
'009'
'090'
'900'
given these exists on the database. thanks!!!!
Use the Like operator.
For Example :-
SELECT Marks FROM Report WHERE Marks LIKE '%009%' OR '%090%' OR '%900%'
Split the string into individual characters, select all rows containing the first character and put them in a temporary table, then select all rows from the temporary table that contain the second character and put these in a temporary table, then select all rows from that temporary table that contain the third character.
Of course, there are probably many ways to optimize this, but I see no reason why it would not be possible to make a query like that work.
It can not be achieved in a straight forward way as there is no sort() function for a particular value like there is lower(), upper() functions.
But there is some workarounds like -
Suppose you are running query for COL A, maintain another column SORTED_A where from application level you keep the sorted value of COL A
Then when you execute query - sort the searchToken and run select query with matching sorted searchToken with the SORTED_A column
What is the most effective (and simple) way to find out if a specific column cells of a table contain one of a given values?
To give you some background, I have a list of 1000 ID numbers. They might or might not exist in a "FileName" column of a table "ProcessedFiles" as a part of the filename.
Basically, I need to check which of these 1000 tasks have been processed (i.e. they exist in the table).
The thing that I came with seems very uneffective:
SELECT * FROM ProcessedFiles
WHERE FileName LIKE '%54332423%'
OR FileName LIKE '%234432%'
OR FileName LIKE '%342342%'
...
etc
Thanks for help!
You could create a temporary table and insert all the Ids in a column. Then you could cross join with the ProcessedFiles table and check for the id in the name with a like:
SELECT pf.*
FROM ProcessedFiles pf,table t
WHERE pf.FileName like '%'+t.Id+'%'
I tested the above and it worked on SQL Server.
I have a table in Postgres. In that table more than 1000 names are there. Most of the names are start with SHRI or SMT. I want to delete this SHRT and SMT from the names and to save original name only. How can I do that with out any database function?
I'll step you through the logic:
Select left(name,3) from table
This select statement will bring back the first 3 chars of a column (the 'left' three). If we are looking for SMT in the first three chars, we can move it to the where statement
select * from table where left(name,3) = 'SMT'
Now from here you have a few choices that can be used. I'm going to keep to the left/right style, though replace could likely be used. We want the chars to the right of the SMT, but we don't know how long each string is to pick out those chars. So we use length() to determine that.
select right(name,length(name)-3) from table where left(name,3) = 'SMT'
I hope my syntax is right there, I'm lacking a postgres environment to test it. The logic is 'all the chars on the right of the string except the last 3 (the minus 3 excludes the 3 chars on the left. change this to 4 if you want all but the last 4 on the left)
You can then change this to an update statement (set name = right(name,length(name)-3) ) to update the table, or you can just use the select statement when you need the name without the SMT, but leave the SMT in the actual data.