how to drop a column in sqlite 在sqlite中可以使用ALTER TABLE语法对表结构进行修改,从官方的文档说明中,语法如下图: 从图中可以看出,ALTER TABLE仅仅支持表名重命名,添加字段,却没有删除字段的方法。那么该如何实现,当然了首先search 一下,群众们给出的一个解决方案就是将数据备份到一张临时表,删除原始表,然...
由于项目需求变更,我需要在sqlite数据库的表中删除一个字段,通用的sql操作语句如下: [sql] view plain copy alter table record drop column name; 结果数据库提示如下错误: 搜索得知,原来SQLite目前还不支持drop column,所以必须想出另外一种方法来进行表字段的删除。 如下sql语句会复制一个和record表一样表结构的...
SQLite使用dropcolumn删除表字段如下sql语句会复制一个和record表一样表结构的temp表出来但是我们想要的是去除某一个字段例如去除record表中的name字段就不要复制它就好了所以sql语句如下 SQLite 使用 dropcolumn 删除表字段 由于项目需求变更,我需要在 sqlite 数据库的表中删除一个字段, 通用的 sql 操作语句如下: [...
SQLite无法使用drop column删除表字段解决办法 由于项目需求变更,我需要在sqlite数据库的表中删除一个字段,通用的sql操作语句如下: altertablerecorddropcolumnname; 1. 结果数据库提示如下错误: 搜索得知,原来SQLite目前还不支持drop column,所以必须想出另外一种方法来进行表字段的删除,读者要是说:“直接删掉这个表,然...
问使用sqlite时出现alter table drop column语法错误EN1 CREATE DATABASE 句法 2 3 CREATE DATA...
public function up(): void { $isSqlite = \Illuminate\Support\Facades\DB::getDriverName() === 'sqlite'; Schema::table('project_assignments', function (Blueprint $table) use ($isSqlite) { if (! $isSqlite) { $table->dropForeign(['user_id']); } $table->dropColumn('user_id'); ...
SQLite does not support the drop column syntax generated by DBeaver when attempting to delete a column. DBeaver syntax "ALTER TABLE aTable DROP COLUMN aColumn;" is not valid in SQLite. https://www.sqlite.org/lang_altertable.html See https://stackoverflow.com/questions/5938048/delete-column...
Hi, SQLite doesn't support modifying constraints/columns to an existing table so DBeaver allows to set them only during table creation so I suggest to support modifying constraints/columns by using this trick (I hate to write scripts whe...
Example 1: Drop the Column from the Table Run the following ALTER TABLE statement to remove the “brand” field from the “products” table: ALTERTABLEproductsDROPCOLUMNbrand; Run the following SQLite command to check whether the “brand” field is deleted or not from the “products” table:...
In SQLite there is not restricted upper limit on the length of an identifier name, so you can use a manageable length of identifier name to be use. Case Sensitivity For the most part, case sensitivity in SQLite is off. Table names and column names can be typed in uppercase, lowercase, ...