owners.Type'help;'or'\h'forhelp.Type'\c'to clear the current input statement.mysql>create user'slave21'@'%'identifiedwithmysql_native_password by'#slvae21!@3LL';QueryOK,0rowsaffected(0.00sec)mysql>grant replication slave on*.*to'slave21'@'%';QueryOK,0rowsaffected(0.00sec)mysql>flush p...
Com_insert + Com_update + Com_delete)、读数量(Com_select)、语句总量(Questions)。 错误 错误量这类指标有多个应用场景比如端连接 MySQL 失败了,或者语句发给 MySQL,执行的时候失败了,都需要有失败计数。典型的采集手段有两种。 在客户端采集埋点,不管MySQL问题or 网络问题或中间负载均衡问题或DNS解析...
END IF ; GET STACKED DIAGNOSTICS CONDITION 1 errno = MYSQL_ERRNO, msg = MESSAGE_TEXT; SELECT 'stacked DA after mapped insert' AS op, errno, msg; END; INSERT INTO t1 (c1) VALUES('string 1'); INSERT INTO t1 (c1) VALUES(NULL); END; // delimiter ; CALL p(); SELECT * FROM t1;...
CREATE TABLE contacts ( 联系电话 varchar(20) , 客户姓名 varchar(50) , PRIMARY KEY(联系电话,客户姓名) ) ENGINE=InnoDB DEFAULT CHARSET=gbk ROW_FORMAT=REDUNDANT; INSERT INTO contacts VALUES ('13701353684','詹'), ('18908641060','钱'); How to get records with Chinese cloumn name?
MySQL thread id 9, OS thread handle 140736685700864, query id 57 localhost root update insert into dl_tab(id,name) values(30,10) *** (1) HOLDS THE LOCK(S): RECORD LOCKS space id 11 page no 5 n bits 72 index ua of table `testdb`.`dl_tab` trx id 56118 lock mode S waiting ...
intmysql_get_option(MYSQL*mysql,enummysql_option option,constvoid*arg) Description Returns the current value of an option settable usingmysql_options(). The value should be treated as read only. Theoptionargument is the option for which you want its value. Theargargument is a pointer to a ...
import pymysql db=pymysql.connect(host='localhost',user='root', password='密码', database='数据库名称称',port=3306) #数据库连接 cursor = db.cursor()#创建一个游标对象 try: sqlQuery = " INSERT INTO table1(Name, professional,number) VALUE (%s,%s,%s) " ...
0 from foo; insert into foo select null,0,0,0 from foo; update foo set j=i, k=i; create index xj on foo(j); create index xjk on foo(j,k); # OK query select k from foo where j = 100; # Bad plan, does full table scan select k from foo FORCE INDEX(`xjk`) where j ...
insert / delete 一行也可能引发死锁。 因为这些操作不是原子性的,它们在执行中会加 index record lock。 例子很好构造。 比如有一张表:create table t1 (id int PRIMARY KEY, name char(20) key); 有两个 session 并发: session 1: insert into t1 (id, name) values(5, 'Branden'); ...
The INSERT ... ON DUPLICATE syntax almost does what I want, but doesn't appear to return the id. Is there a way to narrow this down to a single query, or am I stuck doing a select, and then insert/update? Version 4.1.7