I would like to put a time & date stamp on each row added to a MySQL table. If I understand correctly, I need to create a column for the time & date stamp. How do I do that for the CREATE TABLE query below?
"CREATE TABLE `$table` (id INT(11) NOT NULL auto_increment, site VARCHAR(1000) NOT NULL, actions1 BIGINT(9) NOT NULL, actions2 BIGINT(9) NOT NULL, PRIMARY KEY(id), UNIQUE (site))"
Also, if I understand correctly, I would then need to add the stamp each time a row is inserted to the table. How would I do that for the INSERT INTO query below?
"INSERT INTO `$find` VALUES (NULL, '$site',1,0)"
Thanks in advance,
John
You need to add a TIMESTAMP column like this:
CREATE TABLE `$table` (
id INT(11) NOT NULL auto_increment,
site VARCHAR(1000) NOT NULL,
actions1 BIGINT(9) NOT NULL,
actions2 BIGINT(9) NOT NULL,
CreatedDateTime TIMESTAMP DEFAULT CURRENT_TIMESTAMP
PRIMARY KEY(id), UNIQUE (site))
That will make a column CreatedDateTime which contains the (server) time the row was created.
You can do the insert as:
INSERT INTO `$find` (site, actions1, actions2) VALUES ('$site', 1, 0)
For further reference see here
Related
I made a table like this:
CREATE TABLE options(
id MEDIUM INT NOT NULL AUTO_INCREMENT,
email VARCHAR(254) NOT NULL,
created_at DATETIME DEFAULT NULL,
PRIMARY KEY(id)
);
however.. after inserting a value like:
INSERT INTO options VALUES(0,'test#test.com',CURRENT_TIMESTAMP)
I got the created_at column with this value : 10:29 but right now the time is 16:29.
I believe that's because the server/db is located in the US and I'm in Brazil.
Is there a way to get my current time when inserting values into the table?
I've created a table with 3 columns: postID, userID, and comment.
I have the postID as the primary key, and I am trying to make this auto-increment every time I add a new row to the table.
INSERT INTO CommentTable (postID, userID, comment) VALUES (DEFAULT, "test", "test")
When I run this query, it will run OK once but then when I run it again I get "1062 - Duplicate entry '0' for key 'PRIMARY'".
How do I properly set up an auto-increment primary key?
Here is the table structure:
DROP TABLE IF EXISTS `CommentTable`;
CREATE TABLE `CommentTable` (
`postID` int(10) NOT NULL,
`userID` varchar(10) NOT NULL,
`comment` varchar(1000) DEFAULT NULL,
PRIMARY KEY (`commentID`)
)
No need to put the field postID
INSERT INTO CommentTable (userID, comment) VALUES ("test", "test")
Edit your table as:
CREATE TABLE `CommentTable` (
`postID` int(10) NOT NULL AUTO_INCREMENT,
`userID` varchar(10) NOT NULL,
`comment` varchar(1000) DEFAULT NULL,
PRIMARY KEY (`postID`)
)
Recently I had the same issue where Auto Increment was not saved. It failed every time I tried to save it. My problem was that I had a record where the value was 0 instead of 1, so I updated that record value to a non-zero value, then tried saving the Auto Increment, and it worked.
The zero(0) value in the Primary Index field was causing the ALTER tablename to fail. Once it worked, I put the value back to 0.
CREATE TABLE `tblspmaster` (
`CSN` bigint(20) NOT NULL AUTO_INCREMENT,
`SP` varchar(50) NOT NULL,
`FileImportedDate` date NOT NULL,
`AMZFileName` varchar(580) NOT NULL,
`CasperBatch` varchar(50) NOT NULL,
`BatchProcessedDate` date NOT NULL,
`ExpiryDate` date NOT NULL,
`Region` varchar(50) NOT NULL,
`FCCity` varchar(50) NOT NULL,
`VendorID` int(11) NOT NULL,
`LocationID` int(11) NOT NULL,
PRIMARY KEY (`CSN`)
) ENGINE=InnoDB AUTO_INCREMENT=20018215 DEFAULT CHARSET=latin1;
What is the meaning of AUTO_INCREMENT=20018215 here in table schema . as i am inserting 500k records my identity is OK from 1 to 500k but when i tried to insert next 500k records, next records identity column value is 524281 instead of 500001.
It means that the first auto-assigned value (to CSN) will be 20018215
The large initial value, 20018215, was probably the previous value of the auto increment when you did a "Send to SQL Editor" -> "Create Statement" menu selection in MySQL Workbench. This is just a safe value to skip over existing data just in case you have to reimport the previous records.
I had the same question, but after generating several "Create" edit templates from known tables, I noticed the AUTO_INCREMENT value corresponded to the quantity of existing records in those tables. I removed the large values from my templates since I want my new tables to begin with a primary key = 1.
I have a table in which there is a column name with SP varchar(10) NOT NULL. I want that column always to be unique so i created unique index on that column . My table schema as follows :
CREATE TABLE IF NOT EXISTS `tblspmaster` (
`CSN` bigint(20) NOT NULL AUTO_INCREMENT,
`SP` varchar(10) NOT NULL,
`FileImportedDate` date NOT NULL,
`AMZFileName` varchar(50) NOT NULL,
`CasperBatch` varchar(50) NOT NULL,
`BatchProcessedDate` date NOT NULL,
`ExpiryDate` date NOT NULL,
`Region` varchar(50) NOT NULL,
`FCCity` varchar(50) NOT NULL,
`VendorID` int(11) NOT NULL,
`LocationID` int(11) NOT NULL,
PRIMARY KEY (`CSN`),
UNIQUE KEY `SP` (`SP`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=10000000000 ;
Now i want that if anybody tries to insert duplicate record then that record should be inserted into a secondary table name tblDuplicate.
I have gone through this question MySQL - ignore insert error: duplicate entry but i am not sure that instead of
INSERT INTO tbl VALUES (1,200) ON DUPLICATE KEY UPDATE value=200;
can i insert duplicate row into another table ?
what changes needed to be done in main table scheme or index column ?
**Note : Data will be inserted by importing excel or csv files and excel files generally contains 500k to 800 k records but there will be only one single column **
I believe you want to use a trigger for this. Here is the MySQL reference chapter on triggers.
Use a before insert trigger. In the trigger, check if the row is a duplicate (maybe count(*) where key column value = value to be inserted). If the row is a duplicate, perform an insert into your secondary table.
This table I created in a SQLite database:
CREATE TABLE [tickets] (
[id] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
[coupon_id] INTEGER NULL,
[size] FLOAT NULL,
[phone] VARCHAR(10) NULL,
[date] DATE DEFAULT CURRENT_DATE NULL,
[time] TIME DEFAULT CURRENT_TIME NULL,
[product] TEXT NULL
);
Now INSERT operation is:
INSERT INTO "tickets" VALUES(429,9,18.16,'949-893-5032','2010-11-30','17:46:39','Kids’ Kups Berry Interesting™');
INSERT INTO "tickets" VALUES(430,9,12.04,'847-188-1359','2010-11-25','10:54:00','Raspberry Collider™');
INSERT INTO "tickets" VALUES(431,9,14.1,'204-682-5560','2010-12-08','15:34:07','Celestial Cherry High™');
Now the same table I created in MySQL:
CREATE TABLE tickets (
id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
coupon_id INTEGER NULL,
size FLOAT NULL,
phone VARCHAR(10) NULL,
date TIMESTAMP DEFAULT CURRENT_TIMESTAMP NULL,
time TIMESTAMP DEFAULT CURRENT_TIMESTAMP NULL,
product TEXT NULL
);
INSERT operation for MySQL is:
INSERT INTO tickets VALUES(429,9,18.16,'949-893-5032','2010-11-30','17:46:39','Kids’ Kups Berry Interesting™');
INSERT INTO tickets VALUES(430,9,12.04,'847-188-1359','2010-11-25','10:54:00','Raspberry Collider™');
INSERT INTO tickets VALUES(431,9,14.1,'204-682-5560','2010-12-08','15:34:07','Celestial Cherry High™');
When i am inserting those values I got an error :-there can be only one TIMESTAMP column with current_timestamp in default of on update clause
…but I am not able to insert all those values into MySQL. Help me?
In SQLite you have two columns
[date] DATE DEFAULT CURRENT_DATE NULL,
[time] TIME DEFAULT CURRENT_TIME NULL,
while on MySQL you have only one
date TIMESTAMP DEFAULT CURRENT_TIMESTAMP NULL,
and you're trying to insert two values on it...
You should try
INSERT INTO tickets VALUES(..., '2010-11-30 17:46:39', ...)
At first glace, your varchar column is size 10, but you are inserting greater than length 10 data into it. Make sure your varchar column is wide enough for your data.
Your MySQL Schema appears to be incorrect for what you're trying to insert.
Excerpt from this post: Should I use field 'datetime' or 'timestamp'?
...Timestamps in MySQL generally used to track changes to records, and are updated every time the record is changed. If you want to store a specific value you should use a datetime field.
Change your MySQL schema to something closer to:
...
phone VARCHAR(12) NULL,
date DATE DEFAULT CURRENT_DATE NULL,
time TIME DEFAULT CURRENT_TIME NULL,
...