DROP TABLE [IF EXISTS] [db_name.]table_name; 说明:SQL中加[IF EXISTS] ,可以防止因表不存在而导致执行报错。 参数:db_name:Database名称。如果未指定,将选择当前database。table_name:需要删除的Table名称。 3、示例 以下示例演示DROP命令的使用,依次执行如下SQL语句: --删除整个表course DROP TABLE IF EX...
1、一般情况下删除表数据的sql语句: deletefromproductswhererowid>2 回到顶部 2、如果想给表起个别名再删除呢,就得像下面这样写了 deleteproductsfromproductsaspwherep.rowid>2 回到顶部 也可这样 deletepfromproductsaspwherep.rowid>6 回到顶部 3、想一下,什么情况下删除一个表数据的时候要用别名呢? 之所以要...
DELETE FROM Customers; 删除表 要完全删除表,请使用DROP TABLE语句: 代码语言:sql 复制 删除Customers 表: DROP TABLE Customers; SQL TOP、LIMIT、FETCH FIRST 或 ROWNUM 子句 SQL SELECT TOP 子句用于指定要返回的记录数。 SQL SELECT TOP 子句 SQL Server / MS Access 语法: 代码语言:sql 复制 SELECT TOP ...
syntaxsql Copy -- Syntax for Azure Synapse Analytics and Microsoft Fabric [ WITH <common_table_expression> [ ,...n ] ] DELETE [database_name . [ schema ] . | schema. ] table_name FROM [database_name . [ schema ] . | schema. ] table_name JOIN {<join_table_source>}[ ,......
上面终于面表了,怎样在mssql的delete用用到被delete的表的别名 如果不用别名会写成下面那么复杂 +'delete from'+@strDBName+'.dbo.m_device where nodeid in'+'(select nodeid from'+@strDBName+'.dbo.m_device as m'+'where not exists(select 1 from @tmpDevice where nodeid = m.nodeid) )'...
syntaxsql Copy -- Syntax for Azure Synapse Analytics and Microsoft Fabric [ WITH <common_table_expression> [ ,...n ] ] DELETE [database_name . [ schema ] . | schema. ] table_name FROM [database_name . [ schema ] . | schema. ] table_name JOIN {<join_table_source>}[ ,......
syntaxsqlCopy -- Syntax for SQL Server and Azure SQL Database[WITH<common_table_expression>[ ,...n ] ]DELETE[TOP( expression ) [PERCENT] ] [FROM] { {table_alias||rowset_function_limited[WITH(table_hint_limited[ ...n ] ) ] } | @table_variable} [<OUTPUT Clause>] [FROMtable_...
static void DeleteMultiRow1aJob(Args _args) { MyWidgetTable tabWidget; ; delete_from tabWidget where tabWidget .quantity <= 100; } Example 1b: Delete Method Plus ForUpdate KeywordThe following X++ code example is inefficient. It issues a separate SQL delete call to the database server for...
從SQL Server 中的資料表或檢視移除一或多個資料列。 Transact-SQL 語法慣例 語法 syntaxsql複製 -- Syntax for SQL Server and Azure SQL Database[WITH<common_table_expression>[ ,...n ] ]DELETE[TOP( expression ) [PERCENT] ] [FROM] { {table_alias||rowset_function_limited[WITH(table_hint_limi...
static void DeleteMultiRow1aJob(Args _args) { MyWidgetTable tabWidget; ; delete_from tabWidget where tabWidget .quantity <= 100; } Example 1b: Delete Method Plus ForUpdate Keyword The following X++ code example is inefficient. It issues a separate SQL delete call to the database server ...