SELECT * FROM mytable WHERE myfield >= 'sql' AND myfield < 'sqm'; 此时如果在myfield上有索引的话就可以用了,大大提高速度 再如OR:SELECT * FROM mytable WHERE myfield = 'abc' OR myfield = 'xyz'; 此时应该将它转换成: SELECT * FROM mytable
vHtml += "comment on column "+tableName+".SYNC_STATUS is '同步状态(1-未比对/2-异常数据/5-撤销/7-已入库)';\n"; vHtml += "comment on column "+tableName+".IS_COMPARE is '是否比对入库(0-未比对/1-已比对)';\n"; vHtml += "comment on column "+tableName+".ABNORMAL_HINTS is '...
ATTACHDATABASEBEGINTRANSACTIONcommentCOMMITTRANSACTIONCOPYCREATEINDEXCREATETABLECREATETRIGGERCREATEVIEWDELETEDETACHDATABASEDROPINDEXDROPTABLEDROPTRIGGERDROPVIEWENDTRANSACTIONEXPLAINexpressionINSERTONCONFLICTclausePRAGMAREPLACEROLLBACKTRANSACTIONSELECTUPDATE SQLite 数据类型 SQLite是无类型的. 这意味着你可以保存任何类型的数据到...
create table Test(Id Integer primary key, value text); 此时即可完成表的创建,当把主键设为Integer时,则该主键为自动增长,插入数据时,可直接使用如下语句: insert into Test values(null,'Acuzio'); (3)获取最后一次插入的主键: select last_insert_rowid(); (4)sqlite>.mode col sqlite>.headers on 在...
在数据插入时使用insertWithOnConflict来决定冲突时,该如何处理,此处使用SQLiteDatabase.CONFLICT_REPLACE来决定数据冲突时,替换该条数据 代码语言:javascript 代码运行次数:0 运行 AI代码解释 db.insertWithOnConflict(TABLE_NAME,null,values,SQLiteDatabase.CONFLICT_REPLACE); ...
sqlite>select*frommytable; Nils-Erik|23sqlite> 然后,可以再次打开该数据库,列出它的表和架构,并继续进行插入和删除值的操作。 清单2. 列出表和架构 C:\minblogg>sqlite3 c:\minblogg\www\db\alf.db SQLite version3.2.1Enter ".help"forinstructions ...
ON CONFLICT子句 PRAGMA REINDEX REPLACE ROLLBACK TRANSACTION SELECT UPDATE VACUUM ALTER TABLE SQLite版本的的ALTER TABLE命令允许用户重命名或添加新的字段到已有表中,不能从表中删除字段。 RENAME TO语法用于重命名表名[database-name.]table-name到new-table-name。这一命令不能用于在附加数据库之间移动表,只能...
style: fix typos in comment 1年前 docker feat: add riscv64 binaries 11个月前 lib build: compile OSInfo on the fly if needed by make (#715) 3年前 src feat: better detection of Android environment 9天前 .gitignore chore: update .gitignore to ignore Fleet settings ...
then you are looking at a mirror. The names of check-ins and other artifacts in a Git mirror are different from the official names for those objects. The official names for check-ins are found in a footer on the check-in comment for authorized mirrors. The official check-in name can al...
("drop table if exists person");statement.executeUpdate("create table person (id integer, name string)");statement.executeUpdate("insert into person values(1, 'leo')");statement.executeUpdate("insert into person values(2, 'yui')");ResultSetrs=statement.executeQuery("select * from person");...