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How can I use mySQL replace() to replace strings in multiple records?
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At a very generic level
UPDATE MyTable
SET StringColumn = REPLACE (StringColumn, 'SearchForThis', 'ReplaceWithThis')
WHERE SomeOtherColumn LIKE '%PATTERN%'
In your case you say these were escaped but since you don't specify how they were escaped, let's s...
Place a button right aligned
...ements on the block:
.border {
border: 2px indigo dashed;
}
.d-table {
display:table;
}
.d-table-cell {
display:table-cell;
}
.w-100 {
width: 100%;
}
.tar {
text-align: right;
}
<div class="border d-table w-100">
<p class="d-table-cell">The paragr...
INSERT INTO vs SELECT INTO
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They do different things. Use INSERT when the table exists. Use SELECT INTO when it does not.
Yes. INSERT with no table hints is normally logged. SELECT INTO is minimally logged assuming proper trace flags are set.
In my experience SELECT INTO is most commonly used ...
How to reshape data from long to wide format
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Another option if performance is a concern is to use data.table's extension of reshape2's melt & dcast functions
(Reference: Efficient reshaping using data.tables)
library(data.table)
setDT(dat1)
dcast(dat1, name ~ numbers, value.var = "value")
# name 1 ...
Add a new column to existing table in a migration
I can't figure out how to add a new column to my existing database table using the Laravel framework.
11 Answers
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Which is more efficient: Multiple MySQL tables or one large table?
...ous user details in my MySQL database. Originally it was set up in various tables meaning data is linked with UserIds and outputting via sometimes complicated calls to display and manipulate the data as required. Setting up a new system, it almost makes sense to combine all of these tables into one ...
php is null or empty?
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As is shown in the following table, empty($foo) is equivalent to $foo==null and is_null($foo) has the same function of $foo===null. The table also shows some tricky values regarding the null comparison. (ϕ denotes an uninitialized variables. )
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SQL error “ORA-01722: invalid number”
...er, and the string cannot be converted into a number.
Without seeing your table definition, it looks like you're trying to convert the numeric sequence at the end of your values list to a number, and the spaces that delimit it are throwing this error. But based on the information you've given us, ...
How to do INSERT into a table records extracted from another table
I'm trying to write a query that extracts and transforms data from a table and then insert those data into another table. Yes, this is a data warehousing query and I'm doing it in MS Access. So basically I want some query like this:
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MySQL remove all whitespaces from the entire column
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To replace all spaces :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '')
To remove all tabs characters :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\t', '' )
To remove all new line characters :
UPDATE `table` SET `col_name` = REP...