return fn(self, operation) File "/usr/lib/python2.7/dist-packages/alembic/operations/toimpl.py", line 123, in add_column schema=schema File "/usr/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 172, in add_column self._exec(base.AddColumn(table_name, column, schema=schema)) Fi...
return fn(self, operation) File "/usr/lib/python2.7/dist-packages/alembic/operations/toimpl.py", line 123, in add_column schema=schema File "/usr/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 172, in add_column self._exec(base.AddColumn(table_name, column, schema=schema)) Fi...
I don't use SQLite but according tohttp://sqlite.1065341.n5.nabble.com/quot-default-value-of-column-name-is-not-constant-quot-error-in-table-creation-when-using-double-quos-td66991.htmlyou can have this when using double quotes and parenthesis. ...
-- (1)增加列(字段) alter table tab_name add [column] 列名 类型[完整性约束条件][first|after 字段名]; #添加多个字段 alter table users2 add addr varchar(20), add age int first, add birth varchar(20) after name; -- (2)修改一列类型 alter table tab_name modify 列名 类型 [完整性约束...
ADD (column datatype [DEFAULT expr] [, column datatype]...); ALTER TABLE table MODIFY (column datatype [DEFAULT expr] [, column datatype]...); 1、可以修改数据类型、大小、默认值的更改, 准则: 1、可以增大数字列的宽度或精确度 2、呆以增大数字列或字符列的宽度 ...
本文翻译自SQLite官网文档SQLite File FormatDatabase File Format 1 名词解释 数据库中的概念 Table:数据库中的表,下文称“table”或者“表”。 Column:表中的各个字段,下文称“column”或者“列”或者“字段…
while(sqlite3_step(statement) == SQLITE_ROW) {introwNum = sqlite3_column_int(statement, 0);char*rowData = (char*)sqlite3_column_text(statement, 1);NSString *fieldValue = [[NSString alloc] initWithUTF8String:rowData];// Do something with the data here}sqlite3_finalize(statement); ...
(sqlite,sqlStr,-1,&stmt,NULL);while(sqlite3_step(stmt)==SQLITE_ROW){char*cString=(char*)sqlite3_column_text(stmt,0);NSString*value=[NSString stringWithCString:cString?cString:"NULL"encoding:NSUTF8StringEncoding];NSNumber*value=[NSNumber numberWithLongLong:sqlite3_column_int64(stmt,1)];}...
(); column = gtk_tree_view_column_new_with_attributes("Column 2", renderer, "text", 1, NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column); // 将TreeView添加到窗口中 gtk_container_add(GTK_CONTAINER(window), treeview); // 显示窗口和数据 gtk_widget_show_a...
sqlite3_preppare_v2、column_name、blob操作、sqlite3Close、sqlite3_errmsg... 基本覆盖了所有的读、写、DDL、DML,也包括prepared statement操作;也就是说,在未打开FullMutex的情况下,在一个连接上的所有DB操作必须严格串行执行,包括只读操作。 CoreMutex保护了什么?