MysqlÓû§Ìí¼Ó¼°È¨ÏÞ·ÖÅä
¸ñʽ£ºgrant [PRIVILEGES] on [databaseName.tableName] to [userName]@[host] identified by [password] with grant option;
eg1: grant select on mysql.user to wqh@localhost
eg2:GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP ON expenses.* TO custom@whitehouse.gov IDENTIFIED BY 'stupid';
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tinyint -128~127 0~255
smallint -32768~32767 0~65535
mediumint -8388608~8388607 0~16777215
int -2147483648~2147483647 0~4294967295
bigint -9223372036854775808~9223372036854775807 0~18446744073709551615
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£¨1£©INFORMATION_SCHEMA
select (sum(data_length) + sum(index_length))/(1024*1024) from INFORMATION_SCHEMA.`TABLES` where table_schema = 'your_table_schema' and table_name like 'your_table_name';
£¨2£©show table status like '';
try {
Class.forName("com.mysql.jdbc.Driver");
......
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ÔÒò £ººÇºÇ ±ÈÈç show databases µÄÃüÁî £¬Ö´ÐÐÍêÖ®ºó ɶҲûÓÐ £¬×Ðϸ ÕÒÁËÔÒò £¬Oh my god ÉÙÁË ·ÖºÅ¡£
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USE dxdb;
DELIMITER //
#»ñÈ¡Á÷Ë®ºÅ
DROP PROCEDURE IF EXISTS get_sid;
CREATE PROCEDURE get_sid(para_domain VARCHAR(20), out para_sid BIGINT UNSIGNED)
BEGIN
START TRANSACTION;
UPDATE t_sid SET sID=sID+1 WHERE cDomain=para_domain;
SELECT sID INTO para_sid from t_sid WHERE cDomain=para_domain;
......