sql-ref-syntax-aux-show-columns SHOW COLUMNS - 查看字段信息 查看指定表的所有字段列表,如果表不存在,则会抛出异常. 使用语法 -- 使用语法 SHOW COLUMNS table_identifier [ database ] 1. 2. 使用示例 -- Create `customer` table in `salesdb` database; USE salesdb; CREATE TABLE customer( cust_cd...
show tables[in db_name]show views[in db_name]show columnsindb_name.table_name 1,创建数据库 创建数据库,通过LOCATION 指定数据库文件存储的位置: CREATE{DATABASE|SCHEMA}[IF NOT EXISTS]database_name[LOCATION database_directory] LOCATION database_directory:指定存储数据库文件系统的路径,如果底层的文件...
2.druid是阿里的连接池服务,也提供了解析SQL的工具类入口,能够解析mysql,hive,clickhouse,hbase等十几种SQL,出来的结果直接是可使用的结果,但是有一些语句还是不支持 3.SparkSqlParser是spark的工具类,可以将SQL直接转换为逻辑执行计划的JSON格式,可以解析所有结果,但是逻辑较为复杂,还需要手动去除注释,set的语句等 ...
1、查看已有的database show databases; --切换数据库 use databaseName; 1. 2. 3. 2、创建数据库 create database myDatabase; 1. 3、登录数据库myDatabase; use myDatabase 1. 4、查看已有的table show tables; -- 查看所有表 show tables 'KHDX'; -- 支持模糊查询,表名包含KHDX 1. 2. 5、创...
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["x$DATABASE"=~$DATABASE_REG]]# 遍历符合库名正则表达式的数据库then$MYSQL_CMD-NB-e"SHOW TABLES FROM${DATABASE}"|whilereadTABLEdoif[["x$TABLE"=~$TABLE_REG]]# 遍历符合表名正则表达式的数据表thenSELECT_SQL="select ... from${DATABASE}.${TABLE}"$MYSQL_CMD-NB-e"${SELECT_SQL}">>$...
SQL 复制 --Make sure your user has the permissions to CREATE tables in the [dbo] schema GRANT CREATE TABLE TO [<your_domain_user>@<your_domain_name>.com]; GRANT ALTER ON SCHEMA::<target_database_schema_name> TO [<your_domain_user>@<your_domain_name>.com]; --Make sure your use...
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import com.microsoft.azure.sqldb.spark.config.Config import com.microsoft.azure.sqldb.spark.connect._ val config = Config(Map( "url" -> "mysqlserver.database.windows.net", "databaseName" -> "MyDatabase", "accessToken" -> "access_token", "hostNameInCertificate" -> "*.database.windows...
databaseName| +---+ | default| | hadoop| +---+ scala> hiveContext.sql("show tables").show() +---+---+---+ |database| tableName|isTemporary| +---+---+---+ | default| aa| false| | default| bb| false| | default| dd| false| | default| kylin_account| false| | defaul...