-- insert into Students.student_log(content,create_time) values(concat('将id为:',old.Sname,'已删除'),now()); -- end$$ -- delimiter ; 在创建触发器主体时,还可以使用old和new来获取 SQL 执行insert,update和delete操作前后的写入数据。 注意: 对于insert语句,只有new是合法的,表示当前已插入的记录...
AI代码解释 mysql>use mysql;mysql>update usersetpassword=password("123qqq...A")where user="root"; 删除刚刚添加的 skip-grant-tables 参数,再重启数据库,使用新密码即可登录。 2)重新授权,命令如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 mysql>grant all on*.*to'root'@'mysql-server'i...
UnlikeREPLACE– an inherently destructive command due to theDELETEcommands it performs when necessary – usingINSERT ... ON DUPLICATE KEY UPDATEis non-destructive, in that it will only ever issueINSERTorUPDATEstatements, but neverDELETE. For example, we have decided we wish to replace ourid = 1...
错误号:1007; 符号: ER_DB_CREATE_EXISTS; SQLSTATE: HY000 消息:无法创建数据库“%s”;数据库存在 尝试创建数据库失败,因为该数据库已经存在。 如果您确实要替换现有数据库,请先删除数据库,或者如果要保留现有数据库而不使该语句产生错误,请在该语句中添加一个IF NOT EXISTS子句 CREATE DATABASE。 错误号:1008...
grant select,update,insert,delete on BR to Lbry_reader grant select,insert,update,delete on LogInfo to Lbry_reader 1. 2. 3. 4. 5. 6. 7. 8. 9. 为了验证数据库创建是否成功,我设置了默认添加的用户和数据,默认添加的用户是:“tutu”和“ding”,默认的图书为:“tuBook”和“DingBook”,默认他...
"Can't DROP '%-.64s'. Check that column/key exists", #define ER_INSERT_INFO 1092 "Records: %ld Duplicates: %ld Warnings: %ld", #define ER_UPDATE_TABLE_USED 1093 "You can't specify target table '%-.64s' for update in FROM clause", ...
INSERT INTO sequence VALUES ('SEQ_TRZ_MEMBER_NO',10000000000,1); 1. 二:自定义函数实现: DROP FUNCTION IF EXISTS seq; DELIMITER $$ CREATE FUNCTION seq(seq_name char (20)) returns BIGINT BEGIN UPDATE sequence SET current_value=last_insert_id(current_value+increment) WHERE name=seq_name; ...
ERROR1050(42S01):Table'temp_sales'alreadyexists 解决方法是检查当前会话中是否已经存在同名的临时表。如果已存在,可以先删除现有的临时表,再重新创建: DROPTEMPORARYTABLEIFEXISTStemp_sales;CREATETEMPORARYTABLEtemp_sales ( sale_idINTAUTO_INCREMENTPRIMARYKEY, ...
Firewall stored procedures now avoid performing unnecessary combinations of DELETE plus INSERT statements, as well as those of INSERT IGNORE plus UPDATE operations, thus consuming less time and fewer resources, making them faster and more efficient. User-based stored procedures and UDFs, deprecated ...
INSERTINTOsequenceVALUES('SEQ_TRZ_MEMBER_NO',10000000000,1); 二:自定义函数实现: DROPFUNCTIONIFEXISTSseq; DELIMITER $$CREATEFUNCTIONseq(seq_namechar(20))returnsBIGINTBEGINUPDATEsequenceSETcurrent_value=last_insert_id(current_value+increment)WHEREname=seq_name;RETURNlast_insert_id();END$$ ...