exists-exists文档介绍内容-阿里云

索引

语法 drop_database_stmt:DROP DATABASE[IF EXISTS]database_name;参数说明参数说明 IF EXISTS 用于防止当数据库不存在时发生错误。database_name 指定待删除的数据库名。示例删除数据库test。drop database test;Query OK,0 rows ...

子查询表达式

EXISTS EXISTS(subquery)EXISTS 的参数是一个任意的 SELECT 语句，或者说子查询。系统对子查询进行运算以判断它是否返回行。如果它至少返回一行，那么 EXISTS 的结果就为“真”；如果子查询没有返回行，那么 EXISTS 的结果是“假”。子...

DLA Presto中的建表语句如下：create external table if not exists `tpch_1000x_orc`.`customer`(`c_custkey` bigint,`c_name` string,`c_address` string,`c_nationkey` int,`c_phone` string,`c_acctbal` double,`c_mktsegment` string,...

DDL 语法

DDL 基本语句 Sharding DDL 语句 DDL 基本语句创建数据表 CREATE TABLE IF NOT EXISTS `table_name`(id INTEGER NOT NULL PRIMARY KEY,name VARCHAR(20)NOT NULL,age INTEGER NOT NULL);删除数据表 DROP TABLE table_name;修改数据表/*...

从MaxCompute批量导入导出

对应MaxCompute非分区表 CREATE TABLE IF NOT EXISTS hybriddb_nopart_import_test(uid string,other string)DISTRIBUTE BY HASH(uid)INDEX_ALL='Y' ENGINE='CSTORE'#对应MaxCompute分区表 CREATE TABLE IF NOT EXISTS hybriddb_part_...

ALTER TABLE

alter table sale_detail add if not exists partition(sale_date='201910')partition(sale_date='201911')partition(sale_date='201912')partition(sale_date='202001')partition(sale_date='202002')partition(sale_date='202003')...

DDL语句

create table if not exists h_p0(id bigint,name string,dt string，hh string)using hudi location 'oss:/xxx/h_p0' options(type='cow',primaryKey='id',preCombineField='id')partitioned by(dt,hh);说明本文代码示例中的 location 为...

ALTER INDEX

语法 alter_index_statement:=ALTER INDEX[IF EXISTS]index_identifier ON table_identifier { ADD COLUMNS '(' alter_key_expression ')'|alter_state_expression }[ASYNC]alter_key_expression:=index_key_definition[(',' index_key_...

DROP DATABASE

语法 drop_database_stmt:DROP DATABASE[IF EXISTS]database_name;参数说明参数说明 IF EXISTS 用于防止当数据库不存在时发生错误。database_name 指定待删除的数据库名。示例删除数据库test。drop database test;Query OK,0 rows ...

CREATE USER

CREATE USER[if not exists]user[auth_option][,[if not exists]user[auth_option]].注意事项通过 CREATE USER 创建账号时，您需要拥有 CREATE_USER 权限。账号密码需要满足以下要求：密码长度需在8~32位。密码至少包含三种元素：大写字母...

CREATE DATABASE

CREATE DATABASE基本语法如下：CREATE DATABASE[IF NOT EXISTS]db_name[ON CLUSTER cluster];参数说明：db_name：数据库名。以小写字母开头，可包含字母、数字以及下划线（_），但不能包含连续两个及以上的下划线（_），长度不超过64个字符...

权限管理

CREATE USER 语法：CREATE USER[if not exists]user[auth_option][,[if not exists]user[auth_option]].auth_option:{ IDENTIFIED BY 'auth_string'|IDENTIFIED BY PASSWORD 'hash_string' } MySQL CREATE USER命令文档：...

Hive基础操作

创建库 create database if not exists testdb;当返回信息包含OK时，表示创建库testdb成功。查看库 desc database testdb;使用数据库 use testdb;删除库 drop database if exists testdb;当返回信息包含OK时，表示删除库成功。表操作本文...

创建Custom Container函数

Already exists 1de76e268b10:Already exists d9a8df589451:Already exists 6f51ee005dea:Already exists 5f32ed3c3f27:Already exists 0c8cc2f24a4d:Already exists 0d27a8e86132:Already exists Digest:sha256:a158d3b9b4e3fa813fa6c8c...

INSERT OVERWRITE

CREATE TABLE IF NOT EXISTS public_data.customer(c_customer_sk BIGINT,c_customer_id STRING,c_current_cdemo_sk BIGINT,c_current_hdemo_sk BIGINT,c_current_addr_sk BIGINT,c_first_shipto_date_sk BIGINT,c_first_sales_date_sk ...

客户端错误码

a temp instance exists.403 Forbidden.Authentication The operation is forbidden by Aliyun Realname Authentication System.403 IncorrectDBInstanceConnType Current DB instance conn type does not support this operation.404 ...

附10张表的DDL语句

ods_base_xykbkjl_demo_di建表语句如下：CREATE TABLE IF NOT EXISTS `ods_base_xykbkjl_demo_di`(`id` bigint COMMENT '主键',`cid` string COMMENT '卡ID',`climit` bigint COMMENT '卡额度',`actdate` string COMMENT '统计日期',`...

CreateTable

Message String Table db001.tbl001 already exists 如果创建表出错，返回错误的详细信息。RequestId String 9BEAC206-0795-4DE3-B1FD-964BEF432B23 本次请求的RequestId。Success Boolean false 标记本次请求是否成功。示例请求示例 http...

MaxCompute分区表数据导入

CREATE TABLE IF NOT EXISTS odps_sale_detail(shop_name STRING,customer_id STRING,total_price DOUBLE)PARTITIONED BY(sale_date STRING);在 SQL查询页面，输入如下SQL语句用于向分区表中导入数据，单击运行。向源表增加分区20210815 ...

判断文件是否存在

OSS iOS SDK提供了方便的同步接口以检测Bucket中是否存在指定的文件。示例代码以下代码用于判断指定文件是否存在。...error){ if(isExist){ NSLog(@"File exists.");} else { NSLog(@"File not exists.");} } else { NSLog(@"Error!}

DROP MATERIALIZED VIEW

命令格式 drop materialized view[if exists][<project_name>.];参数说明 if exists：可选。如果没有指定 if exists 且物化视图不存在会返回报错。project_name：可选。物化视图所属目标MaxCompute项目名称。不填写时表示当前所在...

CREATE EXTERNAL TABLE

语法 CREATE EXTERNAL TABLE[IF NOT EXISTS]table_name(column_name column_type[,…])[PARTITIONED BY(column_name column_type[,…])]ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' STORED AS {TEXTFILE|ORC|PARQUET|JSON|RCFIL|HUDI} ...

ALTER INDEX

语法 ALTER INDEX[IF EXISTS]name RENAME TO new_name ALTER INDEX[IF EXISTS]name SET TABLESPACE tablespace_name ALTER INDEX name ATTACH PARTITION index_name ALTER INDEX name DEPENDS ON EXTENSION extension_name ALTER INDEX[IF ...

计算组实例快速入门

DROP FOREIGN TABLE IF EXISTS odps_customer_10g;DROP FOREIGN TABLE IF EXISTS odps_lineitem_10g;DROP FOREIGN TABLE IF EXISTS odps_nation_10g;DROP FOREIGN TABLE IF EXISTS odps_orders_10g;DROP FOREIGN TABLE IF EXISTS odps_part...

DML差异

Subqueries with EXISTS or NOT EXISTS 支持带有EXISTS或NOT EXISTS的子查询。Derived Tables 支持在FROM子句中的子查询。关联子查询，详情请参见关联子查询。部分支持，使用限制请参见使用限制。子查询中包含对外层查询表的引用。...

ALTER FOREIGN TABLE

ALTER FOREIGN TABLE[IF EXISTS]name RENAME TO new_name;示例SQL语句如下。ALTER FOREIGN TABLE test RENAME TO new_test_table;增加列使用Hologres创建外部表查询数据时，当MaxCompute表增加字段后，Hologres不会自动更新Schema，需要您...

ALTER MATERIALIZED VIEW

语法 ALTER MATERIALIZED VIEW[IF EXISTS]name action[,.]ALTER MATERIALIZED VIEW name DEPENDS ON EXTENSION extension_name ALTER MATERIALIZED VIEW[IF EXISTS]name RENAME[COLUMN]column_name TO new_column_name ALTER MATERIALIZED ...

DROP TABLE

DROP TABLE语法用来删除搜索表。语法 DROP TABLE[IF EXISTS]table_name;参数参数描述 table_name 需要删除的表名。示例 DROP TABLE dt;DROP TABLE IF EXISTS dt;

Hologres基于Delta Lake实现湖仓一体

CREATE TABLE IF NOT EXISTS part_textfile(p_partkey integer,p_name varchar(55),p_mfgr char(25),p_brand char(10),p_type varchar(25),p_size integer,p_container char(10),p_retailprice decimal(15,2),p_comment varchar(23))ROW ...

SQL语句

SELECT SELECT INSERT INTO INSERT INTO CREATE CREATE ALTER ALTER DELETE DELETE ... EXISTS KILL KILL OPTIMIZE OPTIMIZE RENAME RENAME EXCHANGE EXCHANGE SET SET SET ROLE SET ROLE TRUNCATE TRUNCATE USE USE WATCH WATCH MOVE MOVE ...

HBase

使用Databricks 读写云数据库HBase数据通过Spark建表读取云数据库HBase数据%sql-使用org.apache.hadoop.hbase.spark创建spark表 CREATE DATABASE IF NOT EXISTS test_hbase;USE test_hbase;DROP TABLE IF EXISTS spark_on_hbase;CREATE ...

从MySQL批量导入导出

use exdb#exdb是HybriDB for MySQL中用户数据库的名称 CREATE TABLE IF NOT EXISTS mysql_import_test_external_table(uid bigint,other string)ENGINE='mysql' TABLE_PROPERTIES='{"url":"jdbc:mysql:/47.100.XX.XX:3306/testdb",...

创建Custom Container函数

Layer already exists 0fb36a16ab83:Layer already exists dd966b9fd474:Layer already exists a1915d7a1111:Layer already exists c4491b3ee709:Layer already exists 9fb10d900487:Layer already exists 3e207b409db3:Layer already ...

DROP USER

DROP USER 用于删除用户。语法 DROP USER[if exists]user[,[if exists]user].注意事项通过 DROP USER 删除用户时，您需要拥有 CREATE_USER 权限。示例 DROP USER account_2;

CreateBgpPeer-向指定的BGP组中添加BGP邻居

400 BgpPeer.Already.Exists bgp peer already exists.-400 MissingParam.EnableBfd The parameter EnableBfd is missing.-400 OperationUnsupported.IPV6ForThisRegion This Region is unsupported IPV6.-400 IllegalParam.BfdMultiHop ...

Hive支持的DDL语句

CREATE[TEMPORARY][EXTERNAL]TABLE[IF NOT EXISTS][db_name.]table_name-(Note:TEMPORARY available in Hive 0.14.0 and later)[(col_name data_type[column_constraint_specification][COMMENT col_comment],.[constraint_specification])...

CreateBgpPeer-向指定的BGP组中添加BGP邻居

400 BgpPeer.Already.Exists bgp peer already exists.-400 MissingParam.EnableBfd The parameter EnableBfd is missing.-400 OperationUnsupported.IPV6ForThisRegion This Region is unsupported IPV6.-400 IllegalParam.BfdMultiHop ...

DROP TABLE

删除表。使用说明 Lindorm宽表引擎版本为2.2.16至2.4.1时，需要先手动执行 OFFLINE ...语法 drop_table_statement:=DROP TABLE[IF EXISTS]table_name 示例 use my_schema;DROP TABLE dt;DROP TABLE IF EXISTS dt;DROP TABLE my_schema.dt;

CREATE SCHEMA

语法 CREATE SCHEMA schema_name[AUTHORIZATION role_specification][schema_element[.]]CREATE SCHEMA AUTHORIZATION role_specification[schema_element[.]]CREATE SCHEMA IF NOT EXISTS schema_name[AUTHORIZATION role_specification]...

alicloud_alb_server_groups

false.NOTE:This parameter exists if the StickySession parameter is set to On.sticky_session_type-The method that is used to handle a cookie.Values:Server and Insert.vpc_id-The ID of the VPC that you want to access.tags-The...

exists

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