hbase create table with multiple column families

Create a table, insert an id column, and automatically generate an id. The id is automatically generated. USE [yuyongTest] GO -- Go: Execute now. The go statement segments the SQL Server script. After a segment is executed, the next segment can be executed, and the segments and segments are completely independent. Temporary variables that span go statements canno

Reprint for self-study ERROR 1075 (42000): incorrect table definition; There can is only one auto column and it must be defined as a key Mysql> CREATE TABLE ANIMALS1 ( -> grp ENUM (' Fish ', ' mammal ', ' bird ') not NULL, -> ID mediumint not NULL auto_increment, -> name CHAR (not NULL), -> PRIMARY KEY (grp,id) ->) En

MySQLHow does a database create a user table and set its IDAuto-increment ColumnWhat about it? This article mainly introduces this process. First, we will introduce the testing environment, and then introduce the detailed Code created, hoping to help you. Environment: PhpMyAdmin SQL Dump Version 3.3.8.1 Http://www.phpmyadmin.net HOST: Export rdc.sae.sina.com.cn: 3307 Generation Date:, January 1

How to combine multiple columns of data into one column in an Excel table Steps 1, open the Excel table, first make a more than one column of data. 2, then right button-copy, paste into Notepad. 3, the first

Because in some cases you want to use a nonexistent column, or you want to create a new virtual modelYou can create a new tableless.rb under concerns under models, with the following code:Module tablelessdef self.included (Base)Base.extend (Classmethods)Base.send (: Include,instancemethods)EndModule Instancemethodsdef save (Validate = True)Validate? Valid? : True

1. Add number of rows, number of columns submit form12345 in - to + - thePlease output the number of rows created: *Please enter the number of columns created: $Panax Notoginseng - the + A the2. Receive the form, create the form12345 6789String rows = Request.getparameter ("Rows");//Accept Form ContentTenString cols = Request.getparameter ("cols"); One%> A - - for(intI=1;i){ the%> - - -

withno_logDBCCshrinkdatabase (database name)execsp_dboption \'database name \', \'autoshrink\', \'true\' \\\'Add field General function Sub AddColumn (tablename,columnname,columntype) Conn.execute (\ "Alter Table \" tablename\ "add \" columnname\ "\" columntype\ "\") End Sub \\\'Change the field general function Sub Modcolumn (tablename,columnname,columntype) Conn.Execute(\"Alter Table\"TableName\"Alter

The following error occurred today when you created a table with a federated master build: ERROR 1075 (42000): incorrect table definition; There can is only one auto column and it must be defined as a key Mysql> CREATE TABLE ANIMALS1 ( -> grp ENUM (' Fish ', ' mammal ', ' b

Tags: sel over l database query sort name Statement data rankNow there is a table as followsId Name Age classify score1 1181 Class 122 2,172 class 193 3,193 Class 30I'm going to rank them according to their scores. Create a new column store sort valuesThe->sql statement is as followsSelect Row_number () over (order by score ASC) as Number,id,name,age,classify,sco

Comparison. Reading comments (0) Today, you need to add multiple languages to the keyboard backlight software. However, the software runs in an XP environment and Mui cannot be applied. Therefore, you have selected string table to support multiple languages. The procedure is as follows: 1. Open the project RC view, select the only string

In this example, review the knowledge of the INNER JOIN clause in the SELECT statement, and for the SELECT statement, refer to the Select SQL command or the SQL language tutorial. The main operation of this example is done in the Init event of the form. Make a connection query in the event and output the query results as a temporary table (the table includes the name, gender, base salary, 3 fields of the Pe

We often keep the same kind of related Excel worksheets in the same document so that we can reference and view them among the tables. When the work in a document is expressed to a certain number, it becomes cumbersome to find the worksheet that you want. It would be a lot easier to create a table of contents worksheet showing the names and links of all the worksheets. Here's a quick way to

IDENTITY () not NULL, stud_name NVARCHAR ( Not NULL, CONSTRAINT pk_student PRIMARY KEY (stud_id) ); Next, try to create a clustered index on the table. CREATE CLUSTERED INDEX index_stud_name on student (stud_name); When executing this statement, SQL Server's message box pops up the processing message: "Cannot