Recent questions tagged MySQL

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mysql - PHP - How to install PDO driver? (Windows)

I am setting up PHP and MySQL (Maria DB) on Windows 8.1. I edited php.ini file and uncommented the ... How can this problem be solved? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - SQL Injection and the LIMIT clause

This question is to settle an argument between me and a coworker. Let's say we have the following query, executed ... a semicolon won't work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - PHP Apache crashes while executing a STORED PROCEDURE

Problem When I execute the following code (I'm calling a stored procedure with 5 IN parameters and 1 OUT parameter) ... : how can I solve it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - PHP Pagination with MySQLi

I'm building my own CMS. I have an administration system made and I can insert posts in the database with it, ... WHERE `status` != 'draft' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - mysqli_affected_rows in PHP insert

I have this code: if(mail($to, $subject, $message, $headers)){ $insert_member_sql = "INSERT INTO members (id, ... 1 after running the query? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - error : #1242 - Subquery returns more than 1 row

I got an error: #1242 - Subquery returns more than 1 row when i run this sql. CREATE VIEW test AS ... free_beds FROM bed GROUP BY cc_name; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Unable to start rails server

I have installed rails and mysql. I have also installed mysql2 gem. I created a rails application by the command ... /rails:6 Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - How to select from dynamic table name

I have tables like changes201101 changes201102 changes201103 ... changes201201 And table whichchanges which contain rows Year ... ' at line 1 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - How to bind datatable to reportviewer runtime

I want to do a bind datatable to reportviewer with the code below. I don't see the results appear in ... )); this.reportViewer.RefreshReport(); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Multiple insert statements in single ODBC ExecuteNonQuery (C#)

I'm inserting multiple rows into a DB, and joining them together in an attempt to improve performance. I ... {System.Data.Odbc.OdbcException} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - How to string-compare for a single space

I want to check whether a column has any values that are a single space character. I initially thought that WHERE ... . Is there a better way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - LEFT OUTER JOIN query not returning expected rows

My aim is to do exactly what a LEFT OUTER JOIN intends to do using the 4th venn diagram: SQL Diagrams: My ... and pick out the correct rows. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Count number of unique characters in a string

I'm looking for a sql statement to count the number of unique characters in a string. e.g. 3333333333 -> returns ... I didn't find a solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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559 views

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mysql - Inserting blob data in Java using PreparedStatement

I am using the following code to insert an image in a database. It will store two images because ... AUTO_INCREMENT=234 DEFAULT CHARSET=latin1; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - SQL query multiple tables, with multiple joins and column field with comma separated list

I have a query where I join three separate tables (node, control, service). Below is their column headings and ... But, it does look promising. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Which is the least expensive aggregate function in the absence of ANY()

I usally use MAX() or MIN() if a DBMS hasn't an ANY() aggregate function. Is there something less expensive in mySQL and MS-SQL? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - SQL - Query to find if a string contains part of the value in Column

I am trying to write a Query to find if a string contains part of the value in Column (Not to confuse ... with value XYZ should be displayed See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Errno 121, duplicate key on write or update?

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0; SET ... it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - PHP mysqli Commands out of sync; you can't run this command now

In my db I have some stored procedures. I want to call the one of them, and according to the results I get from ... $rows["isUserValid"] == 1; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - How to use a variable name in a SQL statement?

I'm using R to call a mySQL statement, where I define the variable outside the statement e.g. foo = 23; ... have $values but not in R. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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707 views

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mysql insert if value not exist in another table

I have two tables that store value as VARCHAR. I'm populating table and I want just insert values in one of tables ... ') How Can I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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877 views

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mysql - FIND_IN_SET with multiple value

I want to search multiple values from database field. below is my query. SELECT * FROM `tablename` WHERE FIND_IN_SET ... its not working for me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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753 views

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mysql - Stored procedure raising "incompatible with sql_mode=only_full_group_by" despite sql_mode being blank

I have a stored procedure that ran fine on MySQL 5.6. During a recent server migration we upgraded to MySQL ... this error is coming from? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - SEPARATOR keyword not working properly in Hibernate Formula

I have following Hibernate forumla query, which I am able to execute in mysql workbanch. select group_concat(distinct ... any idea about this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Converting negative values from FROM_UNIXTIME

I have been trying to convert Date of birth from my DB into DATE FORMat but i am facing the problem of ... such UNIX format like from -957632400 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Bengali-language text not displayed in Unicode CSV file

I have an Excel file in the Bengali language. To display the Bengali text properly I need Bengali fonts installed on ... me go to Google Docs. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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804 views

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mysql - How can I determine when an InnoDB table was last changed?

I've had success in the past storing the (heavily) processed results of a database query in memcached, using the ... help out where it can. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - how to check HikariCP connection pooling is working or not in Java?

I have written following properties in my configuration files I am using Log4j in my application When I ... .jdbc.jdbc2.optional.MysqlDataSource See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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