SQL-- create tables, change table, drop table

Others 2020-03-20 15:05:21 views: null

CREATE TABLE 表4
(
a CHAR(5) NULL,
b CHAR(5) NULL,
c INTEGER not NULL,
)

Four parts: the column name, data type, (NOT) NULL, default

ALTER TABLE `表4`
ADD d CHAR(10)

Change - Add Column

ALTER TABLE `表4`
DROP COLUMN c

Change - Delete Column

DROP TABLE CustCopy

Delete table

Guess you like

Origin www.cnblogs.com/soberkkk/p/12531727.html

SQL-- create tables, change table, drop table

oracle create table, drop table, add fields, delete fields, tables, notes, field notes, modify table properties

Oracle to create tables, delete tables, modify the table (add fields, change fields, remove fields) statement summary

HBase java code development (create tables, add data to the table, query data, filter query, delete data according to rowkey, drop table operation)

Django's configuration file, add or delete pycharm and django connect to the database, create tables and table change search

Change table SQL

Temporary tables are stored in the SQL Server database defined, it really necessary to explicitly delete (drop table #tableName) do?

Create a hive of tables and operations on the data table

Create a temporary table, drop table statement, check repeat

SQL-- créer des tables, table à langer, drop table

Create table SQL SERVER

Create a SQL table

SQL create table

SQL statement to create a table

SQL-- user, tablespace, table, ORACLE

The difference between Oracle DB create table and create any tables

mysql-- create a table, modify table, drop table (concept explained in detail)

SQL code to create a table for a complete

T-SQL to create the table

Copy the SQL data tables and table structure

jQuery EasyUI / TopJUI create a tree table drop-down box

hive create/drop/truncate table (translated from Hive wiki)

SQL Server language create database, create table, modify table

Create a database, including four tables: student table (Student), course table (Course), score table (Score) and teacher information table (Teacher)

The data in the new MySQL table is the data of one or more tables (business scenario: create a relational table, copy the old table data to the new table)

a-table table drag and drop

Create table - copy create table

SqlServer2012- create table, drop table to add a field to delete field operations

Recommended

Ranking

ElasticSearch-- data modeling best practices

Permission Maintenance - Shadow User Backdoor

Refactor the code using MVP mode

Quantitative investment-fundamental model-PVC multi-factor model

Spark Big Data Processing Lecture Notes 3.2 Mastering RDD Operators

Blazor page components (2)

Erlernen von Kenntnissen zur Android-Entwicklung – Kodierung, Verschlüsselung, Hash, Serialisierung und Zeichensätze

About Qi high in JAVA study notes SORM summary detailed personal explanation

Will you calculate the accuracy of the rope displacement sensor in the measurement?

OPENJTAG debugging learning (3): debugging using the gdb command line

Daily

2024-05-01(4)

2024-04-30(36)

2024-04-29(5)

2024-04-28(12)

2024-04-27(29)

2024-04-26(22)

2024-04-25(32)

2024-04-24(30)

2024-04-23(30)

2024-04-22(5)