Recent questions tagged MySQL

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mysql - How to select two columns as one?

I'm trying to search two fields as one from a MySQL database using PHP. e.g. mysql_query(" SELECT ( ... how to achieve the desired result. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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660 views

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mysql - Insert the same fixed value into multiple rows

I've got a table with a column, lets call it table_column that is currently null for all rows of the table. I'd ... do all of the rows at once? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - what is java.io.EOFException, Message: Can not read response from server. Expected to read 4 bytes, read 0 bytes

This question has been asked a couple of times in SO and many times in other sites. But I didn't ... can the NumConnDestroyed > NumConnCreated ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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917 views

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mysql - Sql query to select from 1 hour ago?

I have this query but I want to change the date to delete everything that is from more than 1 hour ago based ... 00' AND post_status = 'publish' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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888 views

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mysql - How to avoid error "aggregate functions are not allowed in WHERE"

This sql code throws an aggregate functions are not allowed in WHERE SELECT o.ID , count(p.CAT) FROM Orders o ... How can I avoid this error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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792 views

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mysql - error: command 'x86_64-linux-gnu-gcc' when installing mysqlclient

I installed django 1.8.5 in virtualenv and using python 3.4.3 the worked displayed the it works page when ... solve this problem Thanks guys!! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Hibernate, JDBC and Java performance on medium and big result set

Issue We are trying to optimize our dataserver application. It stores stocks and quotes over a mysql database. And ... help is very welcome. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - SSH Tunnel for Python MySQLdb connection

I tried creating a SSH tunnel using ssh -L 3306:localhost:22 <hostip> Then running my python script to connect ... some problem with the bind? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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988 views

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mysql - Select Multiple Ids from a table

I want to select some id's based on url string but with my code it displays only the first. If i write manual ... " - "; } Any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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780 views

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mysql - Moving lat/lon text columns into a 'point' type column

I've got a table in my MySQL database called house. Within the house table, there are a couple of text ... values into the new coords column? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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685 views

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mysql - UNIQUE constraint vs checking before INSERT

I have a SQL server table RealEstate with columns - Id, Property, Property_Value. This table has about 5-10 ... the mysql and oracle tags. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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mysql - Delete - I can't specify target table?

Why this query doesn't work? DELETE FROM recent_edits WHERE trackid NOT IN (SELECT DISTINCT history.trackid FROM ... for update in FROM clause See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

1 answer

mysql - Should I stick only to AWS RDS Automated Backup or DB Snapshots?

I am using AWS RDS for MySQL. When it comes to backup, I understand that Amazon provides two types of backup - ... advise me the right set up. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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810 views

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mysql - CREATE TABLE LIKE A1 as A2

I want to create a new table with properties of an old table and without duplicates. I want to do something ... Can anybody modify it to work? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

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mysql - How can I set the default value of a field as '0000-00-00 00:00:00'?

How can I set the default value of a field as '0000-00-00 00:00:00'? If we can't use '0000-00 ... #1067 - Invalid default value for 'date_from' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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779 views

1 answer

mysql - select column as true / false if id is exists in another table

I have 2 tables, one for members and another one for their services. Those are InnoDB tables on MySQL 5.6 server. ... , so I need your help ;) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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762 views

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mysql - SQL many to many select

category_product --------------- id_category id_product product --------------- id_product ... id_category is equal to something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

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mysql - SQL Order By list of strings?

I wish to do a select on a table and order the results by a certain keyword or list of keywords. For example ... Freeze, Hot. Is this possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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764 views

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mysql - java.math.BigInteger cannot be cast to java.lang.Integer

I'm getting the following exception. Caused by: java.lang.ClassCastException: java.math.BigInteger cannot be cast to ... anybody have any idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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722 views

1 answer

mysql - What's the difference in int(11) and int(11) UNSIGNED?

What's the difference in int(11) and int(11) UNSIGNED ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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685 views

1 answer

mysql - Show all current locks from get_lock

Is there any way to select / show all current locks that have been taken out using the GET_LOCK function? Note ... tables (locked by LOCK TABLE) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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822 views

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mysql - Deleting records before a certain date

How would I go about deleting all records from a MySQL table from before a certain date, where the date column is in ... 2011-09-21 08:21:22. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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730 views

1 answer

mysql - Postgresql Current timestamp on Update

What is the postgres equivalent of the below mysql code CREATE TABLE t1 ( created TIMESTAMP DEFAULT ... PROCEDURE update_timestamp(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

1 answer

mysql - Foreign keys in Laravel 4 migrations issue

I've just created a new Laravel 4 project and am finding strange things happening with the foreign key aspect of ... $table->timestamps(); }); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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761 views

1 answer

mysql - Complex WHERE clauses using the PHP Doctrine ORM

I'm using the PHP Doctrine ORM to build my queries. However, I can't quite seem to figure how to ... OR category3 IN $subcategory_in_clause)"); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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702 views

1 answer

mysql - How to restore SQL file generated by MySQLDump using command prompt

I have a SQL file generated by MySQLDump. How can I restore it via command prompt? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

1 answer

mysql - org.hibernate.AssertionFailure: null id in entry (don't flush the Session after an exception occurs)

I have a hibernate and JSF2 application going to the deployment server and suddenly throwing an org.hibernate ... (PrettyFilter.java:118) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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722 views

1 answer

mysql - Python - mysqlDB, sqlite result as dictionary

When I do someting like sqlite.cursor.execute("SELECT * FROM foo") result = sqlite.cursor.fetchone() I think have ... to update all the code... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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