一般而言,大部分数据库支持使用CREATE TEMPORARY TABLE语句来创建临时表。 语法示例 在MySQL中,创建一个临时表来存储用户信息的示例语句如下: CREATE TEMPORARY TABLE IF NOT EXISTS temp_user ( user_id INT PRIMARY KEY, username VARCHAR(50) ); 该语句创建了一个临时的
create temporary table tmp_table(name varchar(10) not null,passwd char(6) not null)‘ 1. 或 CREATE TEMPORARY TABLE IF NOT EXISTS sp_output_tmp ENGINE = MEMORY SELECT …from … where ID=current_id; 1. 临时表只在当前连接可见,当这个连接关闭的时候,会自动drop。这就意味着你可以在两个不同...
创建临时表: CREATETEMPORARYTABLEIFNOTEXISTStemp_employees(name STRING,ageINT); 1. 2. 3. 4. 5. 向临时表中插入数据: INSERTINTOtemp_employeesSELECTname,ageFROMemployeesWHEREage>30; 1. 2. 3. 4. 计算平均年龄: SELECTAVG(age)ASaverage_ageFROMtemp_employees; 1. 2. 状态图 以下是使用Mermaid语法...
CREATETABLEName:'CREATE TABLE'Description: Syntax:CREATE[TEMPORARY]TABLE[IF NOT EXISTS]tbl_name (create_definition,...)[table_options][partition_options]CREATE[TEMPORARY]TABLE[IF NOT EXISTS]tbl_name[(create_definition,...)][table_options][partition_options][IGNORE | REPLACE][AS]query_expressionCR...
select*intotemp table tmp0fromxxx create index idx_tmp0_inner_cdontmp0(inner_cd); 查看临时表是否创建,返回0表示未创建,1为创建 1 selectcount(*)frompg_classwhererelname ='tmp0' 或者用下面,下面语句在pg和mysql中都适用 Create Table If Not Exists temp.MyTable( ...
drop tableifexists koo.nil_temp0222_a2;create tableifnot exists koo.nil_temp0222_a2asselect*,row_number()over(partition by userid order by inserttime)asnn1from(select a.*,b.inserttimeasinserttime_aftr,datediff(b.inserttime,a.inserttime)assession_difffrom(select userid,inserttime,row_number...
create table if not exists temp.user_login_log ( `id` bigint comment '用户id', `login_date` string comment '登录日期' ) comment '用户每日登录流水' 数据预览 idlogin_date 1 2024-04-25 1 2024-04-26 1 2024-04-27 1 2024-04-28 1 2024-04-30 1 2024-05-01 1 2024-05-02 1 2024...
CREATE EXTERNAL TABLE IF NOT EXISTS test ( `quota` STRING COMMENT '', `package` INT COMMENT '', `all_sys` INT COMMENT '' ) COMMENT 'test' PARTITIONED BY (timeline STRING COMMENT '时间分区') STORED AS PARQUET 关于删数据 ? 在删除内部表的时候,hive 将会把属于表的元数据和数据全部删掉;而...
, UNIQUE_CHECKS=0;SET @OLD_SQL_MODE=@@SQL_MODE,SQL_MODE='TRADITIONAL'; CREATE SCHEMA IF NOT EXISTS `transactions` (`transaction_id` ) ON DELETE NO ACT 浏览2提问于2011-07-29得票数0 1回答 无法在PostgresSQL中创建表 、 我试图使用.sql文件和psql在postgres数据库中创建表psql -U postgres -...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name { ({ column_name data_type [ compress_mode ] [ COLLATE collation ] [ column_constraint [ ... ] ] | table_constraint | LIKE source_table [ like_option [...] ] } [, ... ]...