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How to delete a column from a table in MySQL
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Here's a working example.
Note that the COLUMN keyword is optional, as MySQL will accept just DROP IsDeleted. Also, to drop multiple columns, you have to separate them by commas and include the DROP for each one.
ALTER TABLE tbl_Country
DROP COLUMN IsDeleted,
DROP COLUMN CountryName;
This...
How do I check to see if a value is an integer in MySQL?
I see that within MySQL there are Cast() and Convert() functions to create integers from values, but is there any way to check to see if a value is an integer? Something like is_int() in PHP is what I am looking for.
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How to get all columns' names for all the tables in MySQL?
Is there a fast way of getting all column names from all tables in MySQL , without having to list all the tables?
10 Answe...
Select last row in MySQL
How can I SELECT the last row in a MySQL table?
10 Answers
10
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MySQL date format DD/MM/YYYY select query?
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You can use STR_TO_DATE() to convert your strings to MySQL date values and ORDER BY the result:
ORDER BY STR_TO_DATE(datestring, '%d/%m/%Y')
However, you would be wise to convert the column to the DATE data type instead of using strings.
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What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...ot reflected in expressions)
intersection types | implicit conjunction
union types | implicit disjunction
open code | temporal next
closed code | necessity
effects | possibility
reachable state | possible world
monadic metalanguage | lax...
Are nested transactions allowed in MySQL?
Does MySQL allow the use of nested transactions?
2 Answers
2
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How should one use std::optional?
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@Rapptz Line 256: union storage_t { unsigned char dummy_; T value_; ... } Line 289: struct optional_base { bool init_; storage_t<T> storage_; ... } How is that not "a T and a bool"? I completely agree the implementation is very tricky an...
Change auto increment starting number?
In MySQL, I have a table, and I want to set the auto_increment value to 5 instead of 1 . Is this possible and what query statement does this?
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What does it mean when MySQL is in the state “Sending data”?
What does it mean if the Mysql query:
2 Answers
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