auto-increment

问题 I'm trying to set up a SQLite table where the rowid starts from 0 instead of the default 1. The end goal is to be able to run the first INSERT statement and have it insert to rowid 0. Explicitly setting rowid to 0 for that first INSERT is not an option. I've tried a few things related to AUTOINCREMENT but am not having any luck getting this to work cleanly. The only successful way I've found is to insert a row with rowid of -1 and then delete it later. This works but it's messy and I'd like

问题 I have the following table in Postgres 10.10: Table "public.client" Column | Type | Collation | Nullable | Default ---------------------+---------+-----------+----------+------------------------------------------ clientid | integer | | not null | nextval('client_clientid_seq'::regclass) account_name | text | | not null | last_name | text | | | first_name | text | | | address | text | | not null | suburbid | integer | | | cityid | integer | | | post_code | integer | | not null | business_phone

问题 I have MySQL 5.5.37 running on my development machine. I use innodb tables. Faced next problem - autoincrement resets after server restart. Found autoinc_lock_mode, set to 0, but did not helped. SHOW VARIABLES command shows value 0 for autoinc_lock_mode. What I do: select max(id) from tablex; // 11, autoincrement is 12 insert into tablex values ('foo'); select max(id) from tablex; // 12, autoincrement is 13 delete from tablex where id > 11; // autoincrement is 13 Then I restart server... and

问题 I have MySQL 5.5.37 running on my development machine. I use innodb tables. Faced next problem - autoincrement resets after server restart. Found autoinc_lock_mode, set to 0, but did not helped. SHOW VARIABLES command shows value 0 for autoinc_lock_mode. What I do: select max(id) from tablex; // 11, autoincrement is 12 insert into tablex values ('foo'); select max(id) from tablex; // 12, autoincrement is 13 delete from tablex where id > 11; // autoincrement is 13 Then I restart server... and

来源： https://stackoverflow.com/questions/10967990/id-cannot-be-null-auto-increment

来源： https://stackoverflow.com/questions/10967990/id-cannot-be-null-auto-increment

问题 I am creating a table in my Oracle DB using python and sqlalchemy. I would like to have an auto-increment ID column as primary key. How can I modify the following code to add the autoload option or anything like that ? engine = creat_engine("oracle:// ....") Base = declarative_base() class MyTable(Base): __tablename__ = 'MyTable' ID = Column(Integer, Sequence('my_id_seq'), primary_key=True) SomeColumn = Column(VARCHAR(50)) Base.metadata.create_all(engine) p.s. I don't want to create a

问题 I am creating a table in my Oracle DB using python and sqlalchemy. I would like to have an auto-increment ID column as primary key. How can I modify the following code to add the autoload option or anything like that ? engine = creat_engine("oracle:// ....") Base = declarative_base() class MyTable(Base): __tablename__ = 'MyTable' ID = Column(Integer, Sequence('my_id_seq'), primary_key=True) SomeColumn = Column(VARCHAR(50)) Base.metadata.create_all(engine) p.s. I don't want to create a

问题 There's an InnoDB table for storing comments for blog posts used by a custom built web application. Recently I noticed that the auto incremented primary key values for the comments are incrementing by 2 instead of just 1. I also noticed that in another MySQL table which is used for remembering the last few commenter's footprint signature (e.g. ip, session id, uagent string, etc) the name of the PHP session starts with "viruskinq" which is weird because I thought it should always be a

问题 can somebody please help me? How to add auto increment number in div ID using javascript? I have four divs and I'd like to have them automatically numbered (box1, box2, box3, box4) in the ID by javascript. Here's my code <div id="box" class="something"> </div> <div id="box" class="something"> </div> <div id="box" class="something"> </div> <div id="box" class="something"> </div> <script> var list = document.getElementsByClassName("something"); for (var i = 0; i <= list.length; i++) { list[i]