t sql remove duplicates

Using SQL scripts to remove redundant views and tables SQL script Deletes View informationUse DatabaseGOIF object_id (' ViewName ') is not NULLBEGINDROP VIEW ViewNameENDGO SQL script deletes table informationUse DatabaseGOIF EXISTS (SELECT * from dbo.sysobjects WHERE ID = object_id (N ' dbo. TableName ') and OBJE

Springboot using the JPA times error:Only delete the Times wrong,"Data": "Delete failed because: Could not open JPA Entitymanager for transaction; Nested exception is javax.persistence.PersistenceException: Com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:Communications Link failure\n\nthe last packet successfully Received from the server was 190,731 milliseconds ago. The last packet sent successfully to the server was 4 milliseconds ago. ","Success": falseSolution: Added configuration: f

statement similar to "query 10th to 20th record" = = = is often applied to paginated display 1 ) string sql= "Select top * From (SELECT * FROM Test where id rder by m.id desc "; Note that the ID is the primary key, the subquery takes out the first 20 records, the main query first descending and then fetch the first 10, But the result is descending, so the subsequent processing should pay attention to 2) Query article M to nth record: String

SQL statement to remove a character from a fieldUpdate Set Accessory=replace(Castasvarchar(8000)),' Http://demo.m-school.net',')For example:UpdateNotificationsSetAccessory=Replace(Cast(Accessory as varchar(8000)),'http://192.168.2.180',"')UpdateNotificationsSetAccessory=Replace(Cast(Accessory as varchar(8000)),'http://zpzx.m-school.net',"')UpdateHomeworksSetAccessory=Replace(Cast(Accessory as varchar(8000)

Reload MS SQL Server 20,001 needs to completely remove the original installation files, previously always unable to reinstall, the default is accounted for, and now online see the Special Use the following methods to deal with installation suspend problems: 1, in the beginning of the-> run input regedit 2. To HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager location 3, select the file-> e

SQL SELECT DISTINCT Statement Grammar: SELECT DISTINCT column name from table name using DISTINCT keyword If you want to select all the values from the company column, we need to use the SELECT statement: SELECT Company from Orders To select only a different value from the company column, we need to use the Select DISTINCT statement: The code is as follows Copy Code SELECT DISTINCT Company from OrdersLet's take a look

--Create a tableCreate Table Filenames(Filename Varchar (+) NOT NULL)--insert test data with three different suffix namesSELECT * FROM FilenamesINSERT INTO FilenamesValues(' Wahtisup.doc ')INSERT INTO FilenamesValues(' etstahaha.elsx ')INSERT INTO FilenamesValues(' shendong.html ')---function implementation--The REVERSE function arranges the string order of the filename column from right to left--CHARINDEX ('. ', REVERSE (filename)) finds the suffix in reverse order. Specific locations that appe