SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'; TRUNCATE TABLE name truncate语句,是清空表中的内容,包括自增主键的信息。truncate表后,表的主键就会重新从1开始。 check the manual that corresponds to your Mysql server version for the right syntax to yse near...
DELETEt1,t2,...FROMtable1 t1 {JOIN|INNERJOIN|LEFTJOIN} table2 t2ONjoin_conditionWHEREwhere_condition; 1. 2. 3. 4. DELETE t1, t2, ...:指定要删除的表名。 FROM table1 t1:指定要删除的表名,并给表名起一个别名。 {JOIN | INNER JOIN | LEFT JOIN} table2 t2 ON join_condition:指定要...
If theprimary table keyis used to access astandard tableand the key isempty, the first line of the internal table is deleted. If this is known statically, the syntax check produces a warning. 如果使用了primary table key这个东西,但是key又是空的,那么内表的第一条会被删掉,同时给你抛一个警告...
-- 创建测试表CREATETABLEIFNOTEXISTSusers(idINTAUTO_INCREMENTPRIMARYKEY,nameVARCHAR(50),ageINT);-- 插入测试数据INSERTINTOusers(name,age)VALUES('Alice',17),('Bob',20),('Charlie',16);-- 判断记录是否存在并删除DELETEFROMusersWHEREEXISTS(SELECT1FROMusersWHEREage<18);-- 查询删除后的结果SELECT*FRO...
syntaxsql -- Syntax for Parallel Data WarehouseDELETE[FROM[database_name. [ schema ] . | schema. ]table_name] [WHERE<search_condition>] [OPTION(<query_options>[ ,...n ] ) ] [; ] 参数 WITH common_table_expression<> 指定在 DELETE 语句作用域内定义的临时命名结果集,也称为公用表表达式。
Single-Table Syntax DELETE[LOW_PRIORITY][QUICK][IGNORE]FROMtbl_name[PARTITION(partition_name[,partition_name]...)][WHEREwhere_condition][ORDERBY...][LIMITrow_count] TheDELETEstatement deletes rows fromtbl_nameand returns the number of deleted rows. To check the number of deleted rows, call ...
Important!:Notice the statement:mydb.commit(). It is required to make the changes, otherwise no changes are made to the table. Notice the WHERE clause in the DELETE syntax:The WHERE clause specifies which record(s) that should be deleted. If you omit the WHERE clause, all records will ...
语法格式为:DELETE 别名 FROM 表名称 别名 WHERE 列名称 = 值 如果前面不写别名,直接像这样写:DELETE FROM 表名称 别名 WHERE 列名称 = 值,会报语法错误:[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to ...
The DELETE statement is used to delete existing records in a table.DELETE SyntaxDELETE FROM table_name WHERE condition; 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 ...
There might be a time when you need to delete an entire row, for example to meet a data deletion request. The general syntax for deleting a row is as follows. DELETEFROMtable_nameWHEREcondition; To delete a row Open AWS CloudShell and connect to Amazon Keyspaces using the following command...