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How do I find a “gap” in running counter with SQL?

I'd like to find the first "gap" in a counter column in an SQL table. For example, if there are values 1,2,4 and 5 I'd like to find out 3. ...
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How to properly create composite primary keys - MYSQL

Here is a gross oversimplification of an intense setup I am working with. table_1 and table_2 both have auto-increment surrogate primary keys as the ID. info is a table that contains information about both table_1 and table_2 . ...
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Drop multiple tables in one shot in mysql

How to drop multiple tables from one single database at one command. something like, 4 Answers ...
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jQuery get values of checked checkboxes into array

...(function(event){ event.preventDefault(); var searchIDs = $("#find-table input:checkbox:checked").map(function(){ return $(this).val(); }).get(); // <---- console.log(searchIDs); }); Per the documentation: As the return value is a jQuery object, which contains an array...
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Using backticks around field names

...r field` , `field,with,comma` Which does of course generate badly named tables. If you're just being concise I don't see a problem with it, you'll note if you run your query as such EXPLAIN EXTENDED Select foo,bar,baz The generated warning that comes back will have back-ticks and fully qua...
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Efficient SQL test query or validation query that will work across all (or most) databases

...ostgreSQL SQLite SELECT 1 FROM DUAL Oracle SELECT 1 FROM any_existing_table WHERE 1=0 or SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS or CALL NOW() HSQLDB (tested with version 1.8.0.10) Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Apache Commo...
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MySQL search and replace some text in a field

...MySQL query will do a text search and replace in one particular field in a table? 7 Answers ...
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HTML table td meaning

In HTML table, what does td stands for? I mean literally, what is it acronym for? Table division? Table data? 8 Answers ...
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jQuery table sort

I have a very simple HTML table with 4 columns: 15 Answers 15 ...
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MySQL “incorrect string value” error when save unicode string in Django

...developer here) To solve this you need to: Change your MySQL database, table and columns to use the utf8mb4 character set (only available from MySQL 5.5 onwards) Specify the charset in your Django settings file as below: settings.py DATABASES = { 'default': { 'ENGINE':'django.db....