tsql

问题 Converting nText columns which contained XML to the XML data type has resulted in worse performance in SQL Server. I am currently working on a project where nText columns have been used to store valid XML. I have successfully migrated these columns to the XML data type. However according to SQL Profiler the performance of the XML data type is worse than using nText or nvarchar(max) to store the XML. Everything I have read implies that this should not be the case. In order to verify this I

问题 I have data like this: I want to query result like this: Here is my code SELECT PML_CODE ,PML_NAME_ENG ,( SELECT PML_ID ,PML_NO ,PML_CODE ,PML_NAME_ENG ,PML_FORMULA FROM DSP.PARAMET_LIST AS A WITH(NOLOCK) WHERE A.PML_ID = B.PML_ID FOR JSON PATH, WITHOUT_ARRAY_WRAPPER ) AS BR_OBJECT FROM DSP.PARAMET_LIST AS B WITH(NOLOCK) My code works for what I want, but I want to know if there is a better, faster way to write this query? 回答1: Next time please do not post pictures, but rather try to create

问题 Is it good practice to use 'goto' statements in SQL queries? 回答1: Depends on the SQL - some of the dialects don't provide a useful mechanism for flow control other than GOTO. GOTO is generally bad form. 回答2: Not in production code but for testing could be ok. For example, wanting to provide regression testing for a stored procedure where the "common bit" is the call to the procedure being tested and debug statements. declare @test int; set @test = 1; goto tests common: print "common bit"

问题 using mssql, if i have data such as: cols: id, name, list1, list2 1, 'first', '10;15;30;50', '25;12;15;18' 2, 'second', '50;30;15;10, '12;25;11;15' ... 10,'tenth', '9;2;15;1', '5;13;17;45' im trying to create rows of results that join each of those list columns together, such as 1, 'first', 10, 25 1, 'first', 15, 12 1, 'first', 30, 15 1, 'first', 50, 18 2, 'second', 50, 12 2, 'second', 30, 25 2, 'second', 15, 11 2, 'second', 10, 15 ... 10, 'tenth', 9, 5 10, 'tenth', 2, 13 10, 'tenth', 15, 17

问题 using mssql, if i have data such as: cols: id, name, list1, list2 1, 'first', '10;15;30;50', '25;12;15;18' 2, 'second', '50;30;15;10, '12;25;11;15' ... 10,'tenth', '9;2;15;1', '5;13;17;45' im trying to create rows of results that join each of those list columns together, such as 1, 'first', 10, 25 1, 'first', 15, 12 1, 'first', 30, 15 1, 'first', 50, 18 2, 'second', 50, 12 2, 'second', 30, 25 2, 'second', 15, 11 2, 'second', 10, 15 ... 10, 'tenth', 9, 5 10, 'tenth', 2, 13 10, 'tenth', 15, 17

问题 In our SQL Server table we have a json object stored with an array of strings. I want to programatically split that string into several columns. However, I cannot seem to get it to work or even if it's possible. Is this a possibility to create multiple columns within the WITH clause or it is a smarter move to do it within the select statement? I trimmed down some of the code to give a simplistic idea of what's given. The example JSON is similar to { "arr": ["str1 - str2"] } SELECT b.* FROM

问题 In our SQL Server table we have a json object stored with an array of strings. I want to programatically split that string into several columns. However, I cannot seem to get it to work or even if it's possible. Is this a possibility to create multiple columns within the WITH clause or it is a smarter move to do it within the select statement? I trimmed down some of the code to give a simplistic idea of what's given. The example JSON is similar to { "arr": ["str1 - str2"] } SELECT b.* FROM

问题 Could someone please help me with an XML output template please. I have been requested by a client to create an xml output file. This file will then feed in to Client's CRM. So that's why, it has to be an exact match of Client's requested template. I have managed to match it perfectly apart from CDATA for couple of fields. below is the query you can use for testing purposes. I need CDATA wrap for fields Client and Area. I have also attached the output i am getting by running below code If

问题 Could someone please help me with an XML output template please. I have been requested by a client to create an xml output file. This file will then feed in to Client's CRM. So that's why, it has to be an exact match of Client's requested template. I have managed to match it perfectly apart from CDATA for couple of fields. below is the query you can use for testing purposes. I need CDATA wrap for fields Client and Area. I have also attached the output i am getting by running below code If

问题 I have a table containing the below test data: I now would like to fill a restaurant with 12 seating spaces. This should result in: Basically, I need to loop from top to bottom through all rows and add the AmountPersons until I have filled the restaurant. In this example: (first few rows: AmountPersons) 3+1+2+4 = 10 UserId 52 can't be added because they reserved for 3 persons, which would result in 13 occupied places and there are only 12 available. In the next row it notices a reservation