qq 117791303

mysql-8.0.44-winx64.msi VC_redist.2019.x64.exe

MySQL backup.bat

mysqldump --skip-extended-insert

mysqldump: [Warning] Using a password on the command line interface can be insecure.

MySQL   配置文件  my.cnf

mysql uuid()

navicat.exe 绿色版本

ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost:3306' (10061)

mysql-8.0.30-winx64 Install/Remove of the Service Denied!

Data  Desensitizer （MySQL）  数据脱敏处理

ROUND(number, decimals)  四舍五入

Mysql  groupby  分组查询

Identifier name 'index123456789012345678901234567890123456789012345678901234567890' is too long

MySql INDEX  索引语法

SQL Optimization  （SQL 优化）

ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost:3306' (10061)

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) t

1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '+ dept_id BIGINT(19) COMMENT '部门ID organization.id', dept_code VARC' at line 10

Failed to open the referenced table 'qrtz_job_details'

mysql CREATE DATABASE 创建数据库

5.1.47com.mysql.jdbc.Driver8.0.16com.mysql.cj.jdbc.Driver

Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing appl

Caused by: com.mysql.cj.exceptions.CJException: Access denied for user 'root'@'localhost' (using password: YES)

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

印象中oracle好像也是吧。年龄是字符类型varchar。年龄是数字类型int。

ERROR 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '('/',

select @@basedir;

[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column '' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

mysql information_schema

java.sql.SQLSyntaxErrorException: FUNCTION psp.nvl does not exist

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

The reference to entity "useSSL" must end with the ';' delimiter.

java.sql.SQLException: Access denied for user 'crm'@'localhost' (using password: YES)

java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed] with root cause

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INSERT INTO `tbl_dic_type` VALUES

mysql utf8mb4 utf8mb4_general_ci

[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full

Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.