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What are the best practices for managing and optimizing a SQL table that contains 10 million records
I have a table that currently holds 10 million records, and it continues to grow daily. As the dataset expands, I'm encountering significant challenges in retrieving data efficiently and generating reports. The increasing volume of data is causing performance bottlenecks, leading to slow query execution times and delays in report generation. To address these issues, I need to implement strategies for optimizing data retrieval and managing the growing dataset effectively and to ensure that the system remains responsive and capable of handling the increasing data load.
Help in Query to calculate the % from last two timelines
I want to compare the FAmt from last recent two lines and if difference is more than 80% then it should be in the result. The group/index keys are A,B,C,D, Edate. Create table #AR (A int, B char(10), C char(10), D char(10), Edate datetime, FAmt decimal (6,2), G char(2)) Insert into #AR values ('AA','CCC','1','E', '2022-01-01',12.60,'2') Insert into #AR values ('AA','CCC','1','E', '2023-01-01',15.80,'2') Insert into #AR values ('AA','CCC','1','E', '2024-01-01',18.60,'2') Insert into #AR values ('BB','DCC','1','E', '2022-01-01',11.40,'2') Insert into #AR values ('BB','DCC','1','E', '2024-01-01',15.60,'2') Insert into #AR values ('CC','DCC','1','E', '2021-01-01',12.60,'2') Insert into #AR values ('CC','GCC','2','E', '2022-01-01',15.60,'2') Insert into #AR values ('CC','GCC','2','E', '2023-04-01',18.60,'2') Insert into #AR values ('CC','GCC','2','E', '2024-04-01',34.80,'2') --Note: This FAmt is more than 80% from last timeline and it should be in the expected result Expected result: A B C D Edate FAmt G Comments CC GCC 2 E 2024-04-01 34.80 2 Current Amount is > 80% from last timeline
sql query to check status change of an item
I have a table dbo.tblPresentationStatus (sql script at the bottom ) I have to select rows where the status change is wrong. Flow should be as this: Review --> approve --> presentation --> close From 'Review' the status for a specific presentation ID can change to either 'Approve' or 'Presentation' or 'Close' From 'Approve' the status for a specific presentation ID can change to either 'Presentation' or 'Close' From 'Presentation' the status for a specific presentation ID can change to only 'Close' I want to write query to return Presentations with wrong status flow. So expected output as per records given in sql script at the bottom should be : PrID | Status1 | Status2 | Status3 | Status 4 103 | REVIEW | PRESENTATION | APPROVE |CLOSE 101 | APPROVE | REVIEW | NULL | NULL -----------------------------------sql script------------------------------------------- DROP TABLE IF EXISTS#tblPresentation CREATE TABLE#tblPresentation ( PrID int NOT NULL, PrName nvarchar(100) NULL ) INSERT INTO#tblPresentationVALUES (100,'PrA'), (101,'PrB'), (102,'PrC'), (103,'PrD') DROP TABLE IF EXISTS#tblPresentationStatus CREATE TABLE#tblPresentationStatus ( StatusID int NOT NULL, PrID int NOT NULL, PrStatus nvarchar(100) NOT NULL, StatusDate datetime NOT NULL ) INSERT INTO#tblPresentationStatusVALUES --PRESENTATION ID 100 (1,100,'REVIEW','2024-01-01 00:00:00.00'), (2,100,'APPROVE','2024-01-02 00:00:00.00'), (3,100,'PRESENTATION','2024-01-03 07:00:00.00'), (4,100,'CLOSE','2024-01-03 10:00:00.00'), --PRESENTATION ID 101 (5,101,'APPROVE','2024-01-01 00:00:00.00'), (6,101,'REVIEW','2024-01-03 10:00:00.00'), --wrong status change from 'APPROVE' to back ward status of ' REVIEW ' is not allowed --PRESENTATION ID 102 (7,102,'REVIEW','2024-01-01 00:00:00.00'), (8,102,'PRESENTATION','2024-01-02 00:00:00.00'), (9,102,'CLOSE','2024-01-03 10:00:00.00'), --PRESENTATION ID 103 (10,103,'REVIEW','2024-01-01 00:00:00.00'), (11,103,'PRESENTATION','2024-01-02 00:00:00.00'), (12,103,'APPROVE','2024-01-03 00:00:00.00'), --wrong status change from 'PRESENTATION' to back ward status of ' APPROVE' is not allowed (13,103,'CLOSE','2024-01-04 00:00:00.00')
Nested Query Slowing Performance
Hi, At the beginning of my SQL code I have a cte target table called TARGETS, which contains 3 columns TARGET_NAME, MODE AND VALUE. Further down in my query I am trying to use a nested query to retrieve values from this table, however, it is really slowing down the performance. I am wondering if there is a better way to do this? An example of the nested query looks like this SUM(CASE WHEN LEG = 'Empty' AND LOCATION = 'Perth' THEN (SELECT VALUE FROM TARGETS WHERE TARGET_NAME = 'Empty Perth' AND MODE = 'Yes') WHEN LEG = 'Empty' AND LOCATION= 'Melbourne' THEN (SELECT VALUE FROM TARGETS WHERE TARGET_NAME= 'Empty Melbourne' AND MODE = 'No') etc... END) / COUNT(DISTINCT(LEG)) AS Target FROM LEG_DETAILS Many Thanks,
Sticky Notes Account Login and Sync Issue Report
I have a habit of using sticky notes as a daily memo tool, and everything has been functioning normally until recently. On the morning of Friday, November 29th, I suddenly discovered that my sticky notes were unable to sync. After testing by logging out and logging back in, I encountered the message: "Your account does not have an email address, so your sticky notes cannot be saved to the cloud." Since then, I have been unable to log in. That day, I contacted Microsoft Support. An engineer conducted remote testing and found that it was not a system issue, as other accounts could log in successfully. However, the account I normally use, email address removed for privacy reasons, could not log in to Sticky Notes. They advised me to contact customer service and get assistance from the account department. The next day, on Saturday, I contacted the account department. They asked me to log in to Microsoft using my regular account, which I was able to do without issue. However, I still could not log in to Sticky Notes, leaving the account department uncertain about the cause of the problem. They then transferred me to the Office department, but they were also unable to resolve the issue.
Issue with importing json file
I am using the following script to read data from a json file and import into SQL server. Data import works without any issue. However, I noticed that when the json file contains special characters (Ex: è) is replaces it with è I already saved the json file with UTF-8. Is there anyway to import the actual character? drop table if exists #Test3 CREATE TABLE #Test3 ( EMP_COMMON_FULL_NAME NVARCHAR(500), EMP_COMMON_PRIMARY_JOB NVARCHAR(500), PEOPLE_EMAIL NVARCHAR(500), EMP_COMMON_PRIMARY_ORG NVARCHAR(500), PEOPLE_BADGE_NUMBER NVARCHAR(500), PEOPLE_EXPECTED_WEEKLY_HOURS NVARCHAR(500), PEOPLE_EXPECTED_DAILY_HOURS NVARCHAR(500) ); DECLARE @json NVARCHAR(MAX); SELECT @json = BulkColumn FROM OPENROWSET(BULK 'F:\PowerBI\json\file2.json', SINGLE_CLOB, CODEPAGE = '65001') AS jsonFile; INSERT INTO #Test3 ( EMP_COMMON_FULL_NAME, EMP_COMMON_PRIMARY_JOB, PEOPLE_EMAIL, EMP_COMMON_PRIMARY_ORG, PEOPLE_BADGE_NUMBER, PEOPLE_EXPECTED_WEEKLY_HOURS, PEOPLE_EXPECTED_DAILY_HOURS ) SELECT JSONData.EMP_COMMON_FULL_NAME, JSONData.EMP_COMMON_PRIMARY_JOB, JSONData.PEOPLE_EMAIL, JSONData.EMP_COMMON_PRIMARY_ORG, JSONData.PEOPLE_BADGE_NUMBER, JSONData.PEOPLE_EXPECTED_WEEKLY_HOURS, JSONData.PEOPLE_EXPECTED_DAILY_HOURS FROM OPENJSON(@json, '$.data.children') WITH ( EMP_COMMON_FULL_NAME NVARCHAR(500) '$.attributes[0].value', EMP_COMMON_PRIMARY_JOB NVARCHAR(500) '$.attributes[1].value', PEOPLE_EMAIL NVARCHAR(500) '$.attributes[2].value', EMP_COMMON_PRIMARY_ORG NVARCHAR(500) '$.attributes[3].value', PEOPLE_BADGE_NUMBER NVARCHAR(500) '$.attributes[4].value', PEOPLE_EXPECTED_WEEKLY_HOURS NVARCHAR(500) '$.attributes[5].value', PEOPLE_EXPECTED_DAILY_HOURS NVARCHAR(500) '$.attributes[6].value' ) AS JSONData; SELECT * FROM #Test3; { "metadata": { "numNodes": "500", "metadataKey": "fewfewf-sdvrv-evfewsv", "cacheKey": "fewfewf-sdvrv-evfewsv", "currencyCode": "NONE", "totalNodes": "500", "totalElements": "500" }, "data": { "key": { "ROOT": "-1" }, "coreEntityKey": {}, "attributes": [], "children": [ { "key": { "PEOPLE": "67648" }, "coreEntityKey": { "EMP": { "id": "11111" } }, "attributes": [ { "key": "EMP_COMMON_FULL_NAME", "alias": "Name", "rawValue": "Sam, Rogers", "value": "Sam, Rogers" }, { "key": "EMP_COMMON_PRIMARY_JOB", "alias": "Primary Job", "rawValue": "Accountant", "value": "Accountant" }, { "key": "PEOPLE_EMAIL", "alias": "Email Address", "rawValue": "email address removed for privacy reasons", "value": "email address removed for privacy reasons" }, { "key": "EMP_COMMON_PRIMARY_ORG", "alias": "Location", "rawValue": "1ère Inc/1ère Inc", "value": "1ère Inc/1ère Inc" }, { "key": "PEOPLE_BADGE_NUMBER", "alias": "Active Badge Number", "rawValue": "1234", "value": "1234" }, { "key": "PEOPLE_EXPECTED_WEEKLY_HOURS", "alias": "Weekly Hours", "rawValue": "35.75", "value": "35.75" }, { "key": "PEOPLE_EXPECTED_DAILY_HOURS", "alias": "Daily Hours", "rawValue": "7.8", "value": "7.80" } ], "children": [], "summaryListDisplay": [], "rootEntity": "PEOPLE", "customProperties": {} }, { "key": { "PEOPLE": "22222" }, "coreEntityKey": { "EMP": { "id": "22222" } }, "attributes": [ { "key": "EMP_COMMON_FULL_NAME", "alias": "Name", "rawValue": "F3irst1, Last1", "value": "F3irst1, Last1" }, { "key": "EMP_COMMON_PRIMARY_JOB", "alias": "Primary Job", "rawValue": "Cl3erk", "value": "Cl3erk" }, { "key": "PEOPLE_EMAIL", "alias": "Email Address", "rawValue": "email address removed for privacy reasons", "value": "email address removed for privacy reasons" }, { "key": "EMP_COMMON_PRIMARY_ORG", "alias": "Location", "rawValue": "1ère 3Inc/1ère Inc", "value": "1ère 3Inc/1ère Inc" }, { "key": "PEOPLE_BADGE_NUMBER", "alias": "Active Badge Number", "rawValue": "23222", "value": "23222" }, { "key": "PEOPLE_EXPECTED_WEEKLY_HOURS", "alias": "Weekly Hours", "rawValue": "30.0", "value": "30.00" }, { "key": "PEOPLE_EXPECTED_DAILY_HOURS", "alias": "Daily Hours", "rawValue": "30.0", "value": "30.00" } ], "children": [], "summaryListDisplay": [], "rootEntity": "PEOPLE", "customProperties": {} } ], "summaryListDisplay": [], "rootEntity": "ROOT", "customProperties": {} } }Upgrading from 2012 (SP4) to 2019 including SSRS
Hi, I have done a fair bit of googling/reading and found conflicting paths/advice so am looking for a definitive guide. Step by step would be ideal if possible. One of our servers is currently running SQL 2012 and we need to upgrade to 2019. The instance also includes SSRS and the report server is on the same server. With approx. 100+ reports in use. I've read that SSRS does not upgrade when you upgrade the SQL version as it is now a stand alone program (true?) So basically I need to upgrade (in place) SQL Server (easy) but then do what ever I need to do to get SSRS to 2019 and obviously have the report definitions (RDLs) recognise their new environment and upgrade themselves in the process. I imagine the schema path at the top of the RDL would need changing at the very least. We also have scheduled subscriptions that we need to retain.... and of course datasources that point to the relevant DBs (not sure if these would be affected as part of any upgrade/install of SSRS). Would be grateful for any legitimate sources that deal with this scenario and I thank you in advance.
one column refer to 2 columns
Hello there global table is dbo.Employee(EmployeeId int, sex char(10)) Another global table is dbo.GradeEmployee(PolicyEmployeeId int (FK of Employee-EmployeeId), FaultEmployeeId int (FK of Employee-EmployeeId), grade char(5) Another is my temp table called #TmpEmployee(EmployeeId int, employeeName char(50), quantity) GradeEmployee- PolicyEmployeeId is derived from Employee-EmployeeId GradeEmployee- FaultEmployeeId is also derived from Employee-EmployeeId Now, the task is I want to get the data from #TmpEmployee table, there I want to Display in the below format PolicyEmployeeId, FaultEmployeeId, employeeNameSum(quantity) Sum(quantity) is total quantity of a pair FaultEmployeeId, PolicyEmployeeId, note in #TmpEmployee table sometime the Quantity of FaultEmployeeId wont present; sometime the Quantity of PolicyEmployeeId wont present but, in the result it has to display. How to write the select query?SQL Help : Time difference for events within a specific group that resets based on an anchor event
Hi All, Need help with an SQL query to find the time difference between events that happen in sequence, where an anchor event resets the calculation. Below is the sample data and the expected output. thanks
