Alter Table Add Column Date

ALTER alter alter the name of the table structure of the name of the table ALTER TABLE ALTER TABLE ALTER TABLE statement is used to add, modify or delete columns in the existing table. sql alter table syntax To add a column to a table, use the following syntax: alter table table_name add column_name datatype To delete a column in a table, use the following syntax: alter table table _...

Hive in the official document of the query language has a very detailed description, please refer to: http://wiki.apache.org/hadoop/Hive/LanguageManual, most of the content of this article is translated from this page, Some of the things that need to be noted during the use process are added. Create tablecreate [EXTERNAL] TABLE [IF not EXISTS] table_name [col_name data_t ...

Since the installation has been installed well hypertable, the Iron strike experience hql. Prepare the experimental data. hadoop@hadoop:~$ gunzip access.tsv.gz hadoop@hadoop:~$ mv ACCESS.TSV ~/hypertable/0.9.2.5/examples/hql_ tutorial/hadoop@hadoop:~$ CD ~/hypertable/0 ....

Hive data type 1. Basic type Integer type: Tinyint,smallint,int,bigint, the above types correspond to the Byte,short,int,long in Java respectively. Decimal Type: Float,double Boolean type: Boolean string type: String,varchar,char 2. Complex Type Array,map,struct,timestamp (DATE) Common ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall before writing a paging stored procedure, we first create a test table for the database. This test shows that there are 3 fields, called Order, which are or_id,orname,datesta; The following creates a table script: CREATE TABLE [dbo]. [Orders ...]