importjava.sql.Connection;importjava.sql.DatabaseMetaData;importjava.sql.ResultSet;importjava.sql.SQLException;publicclassDatabaseListQuery{publicstaticvoidmain(String[]args){try{Connectionconnection=MySQLConnection.getConnection();DatabaseMetaDatametaData=connection.getMetaData();ResultSetresultSet=metaData.getCa...
Query AnalysisServices.Database AnalysisServices.Databases AzureStorage.BlobContents AzureStorage.Blobs AzureStorage.DataLake AzureStorage.DataLakeContents AzureStorage.Tables Cdm.Contents Csv.Document Cube.AddAndExpandDimensionColumn Cube.AddMeasureColumn Cube.ApplyParameter Cube.AttributeMemberId Cube.Attribute...
Query select tab.table_schema as database_schema, tab.table_name as table_name, col.ordinal_position as column_id, col.column_name as column_name, col.data_type as data_type, case when col.numeric_precision is not null then col.numeric_precision else col.character_maximum_length end as ...
importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.PreparedStatement;importjava.sql.ResultSet;publicclassUserQuery{publicstaticvoidmain(String[]args){// 步骤 1:数据库连接信息Stringurl="jdbc:mysql://localhost:3306/your_database";Stringuser="your_username";Stringpassword="your_password...
一.DDL(Data Definition Language) 数据定义语言 1.数据库 创建数据库:create database db1 删除数据库:drop database db1 切换数据库:use db1 修改数据库:alter database db1 charset utf8; 2.表 创建表: View Code 查看表结构:desc t1 修改表结构:alter table 表名 rename 新表名; ...
Information on the MySQL database query tool provided by RazorSQL. Features include a MySQL database browser, a MySQL SQL editor, import and export tools, and much more.
>MySql Query: SELECT TABLE_NAMEFROM INFORMATION_SCHEMA.TABLESWHERE TABLE_SCHEMA = 'test' Example OutPut:
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Query OK, 0 rows affected (0.00 sec) mysql> quit #设置成功后,一定要退出,然后重新登录方可生效 Bye mysql> use db1; Database changed mysql> select * from emp group by post; #报错 ERROR 1055 (42000): 'db1.emp.id' isn't in GROUP BY mysql> select post,count(id) from emp group by...
或者使用命令:mysql -root -P123456 依然这个错误。 提示信息是:Ignoring query to other database。根据错误可以,知道,是忽略了对其他表的查询。 折腾了半天才发现原来是在连接mysql时没有"-u"参数导致的。 重新使用命令: mysql -uroot -P123456;