I have a table in MySQL and I have append a new column to it with emtpy fields.
Now I am wondering if there is a possibility to append multiple rows to only this specific column without specifying the "where" condition for each row because there are many entries I wanted to so
I have something like this
INSERT INTO table.name
(`column.name`) VALUES
(2,
3,
1,
2,
0);
So that for the first row all values for each column stay the same but the value 2 will be appended to that corresponding empty column, for the 2nd row the value 3 will be attached and so on.
So I wanted to add for ALL rows a corresponding value in this new column. So the first value is for the first row, the second value of this new column for the 2nd row and so on
Thank you in advance!
Related
I am trying to create a SQL loader CTL file and required to ignore rows that are starting with specific number in a column. suppose a column record_id =1211.6540D then ignore the row if the record column value starts with 1211.
I tried with position of numbers but the columns values before the record_id are not constant.
Can you please help.
In MySQL, I understand that in a table, field is used to refer to a column and record is used to refer to rows.
But is there a name for the intersection between a record and a field? I am talking about a singular value of either a record or field. In Excel, it is called a cell.
i.e.:
Column 1 Column 2
Row 1 Row 1, Column 1 Row 1, Column 2
Row 2 Row 2, Column 1 Row 2, Column 2
Row 3 Row 3, Column 1 Row 3, Column 2
What is row 1, column 1 called?
I'd go with Element or Value as the most apt.
There is no equivalent notion in SQL because a table is unordered collection of rows. So there are no cells as fixed spaces to be filled with values. For example
if a table has two equal rows those rows can not be distinguished. Sql has rows, columns and values but no cells.
how can I make a column sortable? I mean, I have a column called "position". When I insert a new row I would like this column to be autoincremented. I would like also that when I change the value of "position" in some row, the rest of the rows will readapt their the values to get a unique list of "position" values like 0,1,2,3,4,5... is this possible using mysql?
I have a column name of index_rows that starts at 1 instead of 0. Is there a way to have the index start 0? For example, row 0, row 1, row 3, etc...
phpMyAdmin > Choose your table > Operations
You can set AUTO_INCREMENT value there.
If you delete a row and insert new values into your table, your new rows will get new unique values. It's not a bug, not a problem. They are auto_incremented values but they don't have to follow each other in a perfect order like 1,2,3,4,5,6,7...
I have a SQL table with many columns (40+). The first column is an ID column and the rest are columns which only take values of 0 or 1. Is there a query in which i can search the row and see which "cells" are equal to 1 and return the column name?
For example, say my ID is 5 and columns 4,9,23 each have a 1 for that row (all others are zero). Therefore i would want to return "Column4","Column9" and "Column23" as my result. I need the ID stipulation in there too so I know which row to examine.
Any ideas? Thanks!