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#1251 - Client does not support authentication protocol requested by server; consider upgrading MySQL client
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mysql>;set password for 'Óû§Ãû' @ 'Ö÷»úÃû' = old_password('ÃÜÂë'); ×¢ÒâǰºóµÄ·ÖºÅ
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TINYINT
-128 - 127
TINYINT UNSIGNED
0 - 255
SMALLINT
-32768 - 32767
SMALLINT UNSIGNED
0 - 65535
MEDIUMINT
-8388608 - 8388607
MEDIUMINT UNSIGNED
0 - 16777215
INT »ò INTEGER
-2147483648 - 2147483647
INT UNSIGNED »ò INTEGER UNSIGNED
0 - 4294967295
BIGINT
-9223372036854775808 - 92233720 ......
drop table student;
create table student
(sno int not null unique,
sname varchar(8) not null,
ssex char(2) not null,
sage int ,
sdept varchar(20));
select * from student;
alter table student drop uniq ......
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$ mysql -hserverip -uuser -ppassword
ERROR 1045 (28000): Access denied for user 'user'@'localhost'
(using password: YES)
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$ mysql -uroot -ppassword #ÓÃrootÓû§ÔÚserverÉϵǼ
mysql> select host, user, password from mysql ......
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SET GLOBAL character_set_client = utf8;
SET GLOBAL character_set_connection = utf8;
SET GLOBAL character_set_database = utf8;
SET GLOBAL character_set_results = utf8;
......
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