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Sql server dynamic sequences


Sql server dynamic sequences

By : Diana Lorena Giraldo
Date : November 20 2020, 01:01 AM
will be helpful for those in need Is there a specific reason for requiring that the invoice numbers are only unique per client? In most ERP systems, invoice numbers are typically globally unique, making implementation much easier. No matter what, you should have an Invoice table that contains a primary key (and you shouldn't use composite primary keys - that's just downright bad data modelling).
This leaves us with a scenario where you might not need to store the "per-client-invoice-number" in the database at all. Assuming you have a table called "Invoices" containing the following data:
code :
Id   | ClientId
---------------
  1  |        1
  2  |        1
  3  |        2
  4  |        1
  5  |        3
  6  |        2
SELECT 
    ClientId,
    'IN' + RIGHT('0000' + 
             CONVERT(VARCHAR, ROW_NUMBER() OVER (PARTITION BY ClientId 
                                                 ORDER BY Id)) AS InvoiceNo,
    Id
FROM Invoices
ORDER BY ClientId, InvoiceNo
ClientId | InvoiceNo | Id
---------------------------
      1  |    IN0001 |  1
      1  |    IN0002 |  2
      1  |    IN0003 |  4
      2  |    IN0001 |  3
      2  |    IN0002 |  6
      3  |    IN0001 |  5


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Using sequences in dynamic SQL

Using sequences in dynamic SQL


By : Brett Davis
Date : March 29 2020, 07:55 AM
I wish did fix the issue. A sequence is spectacularly the wrong tool for this job. Not only are you executing unnecessary DDL, but sequences aren't transaction-safe or guaranteed gapless. (They also all share a namespace, so your procedures are likely to have to wait for each other in annoying ways).
Don't use a sequence. It's about as good for the job as a rubber chicken is as a hammer.
code :
EXECUTE format('
  INSERT INTO row (trans_id, row_in_trans)
  SELECT 
    p_trans_id, 
    row_number() OVER (ORDER BY p_trans_id)
  FROM sales 
  WHERE trans_id = p_trans_id AND %s', p_where_clause);
Dynamic Programming - With 3 sequences.and finding the maximized value

Dynamic Programming - With 3 sequences.and finding the maximized value


By : Shalord Tito Okello
Date : March 29 2020, 07:55 AM
I hope this helps you . You solution doesn't sound at all like dynamic programming.
The problem basically asks to find a maximum sum longest common subsequence, where the common subsequence is between A and B and the sum is from P.
code :
backtrack(LCS, A, B, i, j):
    if i == 0 or j == 0
        return ""

    if A[i] == B[j]:
        return backtrack(LCS, A, B, i-1, j-1) + A[i]
    else if LCS[i-1, j] > LCS[i, j-1]:
        return backtrack(LCS, A, B, i-1, j)
    return backtrack(LCS, A, B, i, j-1)
backtrack(LCS, A, B, i, j, s=0):
    if i == 0 or j == 0
        return s

    if A[i] == B[j]:
        return backtrack(LCS, A, B, i-1, j-1, s + P[i])
    else if LCS[i-1, j] > LCS[i, j-1]:
        return backtrack(LCS, A, B, i-1, j, s)
    else if LCS[i-1, j] < LCS[i, j-1]:
        return backtrack(LCS, A, B, i, j-1, s)
    else:
        return max(backtrack(LCS, A, B, i-1, j, s),
                   backtrack(LCS, A, B, i, j-1, s))
Replace dynamic sequences in text string using a vector in R

Replace dynamic sequences in text string using a vector in R


By : Shahid Ahmad
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You can do this with gsub. The regex says to look for a combination of letters followed by ".i _ " then the same combination followed by ".c", and replace the whole thing with the same combination followed by ".c".
code :
ts <- gsub("([A-Za-z]+)\\.i\\s_\\s\\1\\.c","\\1\\.c",text.seq)

ts
[1] "An.i _ Bo.i _ An.c _ Cx.i _ Cx.c" "An.i _ Bo.i _ Dz.c" "Cx.c _ Cx.i _ An.c" 
Counting valid sequences with dynamic programming

Counting valid sequences with dynamic programming


By : user3223767
Date : March 29 2020, 07:55 AM
help you fix your problem For a moment let's just not care about the array. Let's implement this recursively. Let dp(i, j, k) be the number of sequences with length i, last element j, and k consecutive occurrences of j at the end of the array.
The question now becomes how do we write the solution of dp(i, j, k) recursively.
code :
def dp(i, j, k):

    # this is the base case, the number of sequences of length 1
    # one if k is valid, otherwise zero
    if i == 1: return int(k == 1)

    if k > 1:
        # get all the valid sequences [0...i-1] and add j to them
        return dp(i - 1, j, k - 1)

    if k == 1:
        # get all valid sequences that don't end with j
        res = 0
        for last in range(len(A)):
            if last == j: continue
            for n_consec in range(1, A[last] + 1):
                res += dp(i - 1, last, n_consec)
        return res
Concern with the use of dynamic sequences in ESB 4.5.0

Concern with the use of dynamic sequences in ESB 4.5.0


By : L LL
Date : March 29 2020, 07:55 AM
this one helps. You can enable statistics for dynamic endpoints and dynamic sequences by this way: 1. Go to the registry resource, eg:- /_system/config/Hello 2. Content -> Edit as text 3. Add statistics="enable" to address element
Then if you have used that endpoint, statistics will be fired to BAM and you can see those if the Mediation statistics toolbox is installed.
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