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INSERT with SELECT
...HASULTANTEMURI Different question. But if I understand what you're asking, SQL Server (not what was asked, but what I use these days) has the OUTPUT clause, which lets you put whatever you inserted into another table also. I don't think MySQL has an equivalent. You might create a temporary table, se...
SQL UPDATE all values in a field with appended string CONCAT not working
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That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(dat...
'^M' character at end of lines
When I run a particular SQL script in Unix environments, I'm am seeing a '^M' character at the end of each line of the SQL script as it is echoed to the command-line. I don't know on which OS the SQL script was originally created.
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Database cluster and load balancing
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Postgresql docs refer to "database cluster" differently: "Before you can do anything, you must initialize a database storage area on disk. We call this a database cluster. (SQL uses the term catalog cluster.) A database cluster is a...
When to use Hadoop, HBase, Hive and Pig?
...ities on top of an existing Hadoop cluster. Along with that it provides an SQL like interface which makes your work easier, in case you are coming from an SQL background. You can create tables in Hive and store data there. Along with that you can even map your existing HBase tables to Hive and opera...
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
... a manual to install a software suite on Ubuntu. I have no knowledge of mySQL at all, actually. I have done the following installations on my Ubuntu.
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TSQL - How to use GO inside of a BEGIN .. END block?
... +1! This is the ONLY practical Answer so far for use in a SS SQLCMD Mode Script (i.e. a master deployment script) that calls (via :r command) other SS Scripts (i.e. sub-deployment scripts) with some of those calls inside if Statements. Oded's, mellamokb's and Andy Joiner's Answers of ...
Drop multiple tables in one shot in mysql
...in the correct order, nor whether they actually exist.
N.B. this is for MySQL only (as in the question). Other databases likely have different methods for doing this.
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SQL SELECT speed int vs varchar
I'm in the process of creating a table and it made me wonder.
9 Answers
9
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difference between primary key and unique key
I'm using mysql database. I have a confusion between primary key and unique key.
15 Answers
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