mysql alter table
If none are given, ALTER TABLE does nothing. The syntax for many of the permissible alterations is similar to clauses of the CREATE TABLE statement. column_definition clauses use the same syntax for ADD and CHANGE as for CREATE TABLE . For more informatio,ALTER TABLE t2 ADD c INT UNSIGNED NOT NULL AUTO_INCREMENT, ADD PRIMARY KEY (c);. We indexed c (as a PRIMARY KEY ) because AUTO_INCREMENT columns must be indexed, and we declare c as NOT NULL because primary key columns cannot be NULL . For NDB tables, it
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 mysql alter table 相關參考資料
MySQL :: MySQL 5.7 Reference Manual :: 13.1.8 ALTER TABLE Syntax
ALTER TABLE changes the structure of a table. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can... https://dev.mysql.com MySQL :: MySQL 5.5 Reference Manual :: 13.1.7 ALTER TABLE Syntax
If none are given, ALTER TABLE does nothing. The syntax for many of the permissible alterations is similar to clauses of the CREATE TABLE statement. column_definition clauses use the same syntax for A... https://dev.mysql.com MySQL 5.6 Reference Manual :: 13.1.7.3 ALTER TABLE Examples
ALTER TABLE t2 ADD c INT UNSIGNED NOT NULL AUTO_INCREMENT, ADD PRIMARY KEY (c);. We indexed c (as a PRIMARY KEY ) because AUTO_INCREMENT columns must be indexed, and we declare c as NOT NULL because p... https://dev.mysql.com MySQL :: MySQL 5.6 Reference Manual :: 13.1.7 ALTER TABLE Syntax
Multiple ADD , ALTER , DROP , and CHANGE clauses are permitted in a single ALTER TABLE statement, separated by commas. This is a MySQL extension to standard SQL, which permits only one of each clause ... https://dev.mysql.com MySQL :: MySQL 5.7 Reference Manual :: 13.1.8.2 ALTER TABLE ...
MySQL NDB Cluster 7.5 supports online table schema changes using the standard ALTER TABLE syntax employed by the MySQL Server ( ALGORITHM=DEFAULT|INPLACE|COPY ), and described elsewhere. Note. Some ol... https://dev.mysql.com MySQL :: MySQL 8.0 Reference Manual :: 13.1.8 ALTER TABLE Syntax
ALTER TABLE changes the structure of a table. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can... https://dev.mysql.com MySQL 5.7 Reference Manual :: 13.1.8.4 ALTER TABLE Examples
We indexed c (as a PRIMARY KEY ) because AUTO_INCREMENT columns must be indexed, and we declare c as NOT NULL because primary key columns cannot be NULL . For NDB tables, it is also possible to chang... https://dev.mysql.com 使用MySQL ALTER TABLE 語法修改資料表欄位 - 史丹利愛碎念 - 痞客邦
使用MySQL ALTER TABLE 語法修改資料表欄位使用MySQL時，會需要使用到指令來動態調整TABLE的Schema或建立TABLE 因此以下列出跟ALTER TABL. http://newaurora.pixnet.net MySQL ALTER命令| 菜鸟教程
MySQL ALTER命令当我们需要修改数据表名或者修改数据表字段时，就需要使用到MySQL ALTER命令。 开始本章教程前让我们先创建一张表，表名为：testalter_tbl。 root@host# mysql -u root -p password; Enter password:******* mysql> use RUNOOB; Database changed mysql>... http://www.runoob.com SQL ALTER TABLE Statement - W3Schools
ALTER TABLE Persons ADD DateOfBirth date;. Notice that the new column, "DateOfBirth", is of type date and is going to hold a date. The data type specifies what type of data the column can ho... https://www.w3schools.com |