We can delete one or more records (commonly known as rows) from a table using the delete statement. The Delete statement removes some or all data (rows) from a table. According to Microsoft documentation, the D
This table contains 4 million rows, and the user executed the command to select all records from this table. 该表包含400万行,用户执行命令以从该表中选择所有记录。 SELECT * FROM Products; 1. Capture the actual execution plan (press CTRL + M) of this query along with client statistics (pres...
DELETEThe DELETE command is used to delete existing records in a table.The following SQL statement deletes the customer "Alfreds Futterkiste" from the "Customers" table:Example DELETE FROM Customers WHERE CustomerName='Alfreds Futterkiste'; Try it Yourself » ...
Usage: sqlcmd [flags] sqlcmd [command] Examples: # Install/Create, Query, Uninstall SQL Server sqlcmd create mssql --accept-eula --using https://aka.ms/AdventureWorksLT.bak sqlcmd open ads sqlcmd query "SELECT @@version" sqlcmd delete # View configuration information and connection strings...
Usage: sqlcmd [flags] sqlcmd [command] Examples: # Install/Create, Query, Uninstall SQL Server sqlcmd create mssql --accept-eula --using https://aka.ms/AdventureWorksLT.bak sqlcmd open ads sqlcmd query "SELECT @@version" sqlcmd delete # View configuration information and connection strings...
SCOTT@PROD>create table testasselect*from emp;SCOTT@PROD>insert into test select*from test;SCOTT@PROD>/ 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SCOTT@PROD>deletefrom test;SCOTT@PROD>commit; 代码语言:javascript 代码运行次数:0
DELETE FROM TestTable WHERE ID IN (1,3,54,68)--sql2005下运行通过 当用户在界面上不连续的选择多项进行删除时,该语句比循环调用多次删除或多条delete语句中间加分号一次调用等方法都高效的多。 2.批量插入的写法: 代码 sql写法: INSERT INTO TestTable SELECT1,'abc'UNION SELECT2,'bcd'UNION SELECT3,'...
Db.Storageable(list2).ExecuteCommand(); Db.Storageable(list2).PageSize(1000).ExecuteCommand(); Db.Storageable(list2).PageSize(1000,exrows=> { }).ExecuteCommand(); Feature9 : Auto split table Split entity [SplitTable(SplitType.Year)]//Table by year (the table supports year, quarter,...
④优化表:消除delete、update语句执行时造成的空间浪费。 分析表 语法如下: analyze [local | no_write_to_binlog] table 表名1; 复制代码 其中的可选参数local、no_write_to_binlog代表是否将本条SQL记录进bin-log日志,默认情况下是记录的,加上这两个参数中的其中一个后则不会记录,执行效果如下: 如果Msg...
DELETE- allows them to delete rows from tables INSERT- allows them to insert rows into tables SELECT- allows them to use the Select command to read through databases UPDATE- allow them to update table rows GRANT OPTION- allows them to grant or remove other users' privilege...