DELETEFROMtable_nameWHEREcondition; Note:Be careful when deleting records in a table! Notice theWHEREclause in theDELETEstatement. TheWHEREclause specifies which record(s) should be deleted. If you omit theWHERE
DELETE FROM Customers WHERE CustomerName='Alfreds Futterkiste'; Try it Yourself » Note: Be careful when deleting records in a table! Notice the WHERE clause in the DELETE statement. The WHERE clause specifies which record(s) should be deleted. If you omit the WHERE clause, all records ...
MySQL+executeQuery(String sql)DeleteRecord-table_name: String-condition: String+deleteRecords()UpdateIndex+updateIndex()ReleaseTableSpace+releaseSpace()ReuseTableSpace+reuseSpace() 上述类图中,MySQL类提供了执行查询语句的方法。DeleteRecord类用于删除记录,UpdateIndex类用于更新索引,ReleaseTableSpace类...
sql DELETE FROM table_name WHERE condition; 其中,table_name表示要删除记录的表名,condition为删除记录的条件。 3.设置adoquery的SQL属性:在执行删除操作之前,需要将SQL语句赋值给adoquery的SQL属性。例如: delphi ADOQuery1.SQL.Text := 'DELETE FROM table_name WHERE condition'; 4.执行SQL语句:最后,调用ado...
在下面的一组程序示例中,第一个程序创建了一个名为SQLUser.WordPair的表,该表有三列。下一个程序插入六条记录。后续程序使用基于指针的嵌入式SQL删除所有英语记录,并使用动态SQL删除所有法语记录。最后一个程序显示剩余的记录,然后删除该表。 ClassMethod Delete1() { &sql( CREATE TABLE SQLUser.WordPairs ( La...
"manages"Database-recordId: int-tableName: string+deleteRecord(id: int) : void+deleteBatch(ids: List) : voidUser-userId: int-age: int+deleteUser() : void 五、甘特图 为了更好地规划和设计批量删除操作的实施步骤,下面的甘特图展示了一个包含准备工作、执行删除和后续检查阶段的时间表。
The following example passes search conditions to the delete() method. All records matching the condition are deleted from the city table. In this example, one record matches the condition. mysql-js> db.city.delete().where("Name = 'Olympia'")Delete the First Record ...
\374\002") at /home/Code/GitHub/stonedb/sql/handler.cc:8189#2 0x00000000025ebf12 in write_record(thd=0x7fdcec000bc0,table=0x7fdcec00fdf0,info=0x7fe0c81c9b00, update=0x7fe0c81c9a80) at /home/Code/GitHub/stonedb/sql/sql_insert.cc:1904#3 0x00000000025e8fdd in Sql_cmd_in...
alter tableUSER.TABLElogging; 9.rename索引,并重建索引。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 alter indexUSER.INDEX1rename toINDEX1_20210410;--重建索引 create indexUSER.INDEX1onUSER.TABLE(***)tablespaceTBSparallel8;--取消并行 ...
[IN nWorkArea | cTableAlias] [NOOPTIMIZE]参数 Scope 指定要做删除标记的记录范围，Scope 子句有：ALL、NEXT nRecords、RECORD nRecordNumber 和 REST。有关 Scope 子句的详细内容，请参阅 scope(作用域)子句 和 语言概述。DELETE 的默认范围是当前记录 (NEXT 1)。FOR lExpression1 指定一个条件...