2）modify mysql> alter table t1 modify id num int(2);ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'num int(2)' at line 1 mysql> 结论：能用change重命名，而modify...
ALTER TABLE - ALTER/MODIFY DATATYPE To change the data type of a column in a table, use the following syntax: SQL Server / MS Access: ALTERTABLEtable_name ALTERCOLUMNcolumn_name datatype; My SQL / Oracle (prior version 10G): ALTERTABLEtable_name ...
总结:modify和change的区别:修改列属性时,使用change比较麻烦,要写两次列名称,而使用modify只需要写一次列名称就可以了。 3.2、修改列名字 mysql>ALTERTABLEexercise CHANGE id_new id_new_new; ERROR1064(42000): You have an errorinyour SQL syntax;checkthe manual that correspondstoyour MySQL server versionfo...
We can also use Oracle "alter table" syntax in dynamic PL/SQL to modify data columns BEGIN SQL_STRING := 'ALTER TABLE '||:TABLE_NAME||' MODIFY '||:COLUMN_NAME||' VARCHAR2(100)'; . . . END;
you have an error in your SQL syntax;check the manual that corresponds to your MySQL server version for the right syntax to use near (20,5) ADD COLUMN p10gc decimal(20,5) at line 1 1. 原因 从语句看 完全没有问题。 主要是看操作的编辑器,我用的mysql-front,原来类型关键字 需要 与 字段...
如下,修改Dec字段的数据,发现一直报错说SQL语法错误。最后在Dec两边加上``才解决 mysql> update _maintenance_execplan set Dec="20181214" where syscode = 'caiwu' and id="1861"; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server ver...
修改先前在 SQL Server 2008 R2 中執行 CREATE PROCEDURE 陳述式所建立的程序。 Transact-SQL 語法慣例 (Transact-SQL)語法 複製 --Transact-SQL Stored Procedure Syntax ALTER { PROC | PROCEDURE } [schema_name.] procedure_name [ ; number ] [ { @parameter [ type_schema_name. ] data_type } [ ...
The database_file_clauses let you modify datafiles and tempfiles. You can use any of the following clauses when your instance has the database mounted, open or closed, and the files involved are not in use. CREATE DATAFILE Use the CREATE DATAFILE clause to create a new empty datafile...
syntaxsql コピー -- SQL Server Syntax ALTER DATABASE { database_name | CURRENT } { MODIFY NAME = new_database_name | COLLATE collation_name | <file_and_filegroup_options> | SET [ ,...n ] [ WITH <termination> ] } [;] <file_and_filegroup_options>::= <add_or_modify_files...
Transact-SQL 语法约定 语法 SQL Server、Azure SQL 数据库和Azure SQL 托管实例的语法。 syntaxsql 复制 ALTER INDEX { index_name | ALL } ON { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partitio...