database

问题 I am currently still learning PHP so some things I still struggle with. I have been taking it slowly and reading tutorials which has helped but I can't figure this one out. I have a database table (in mysql) with let's say, 100 urls. There is a column called 'url' and a second column 'text'. I already have the pagination code which works, so will also be using that. What I want to do is echo out the URLs (which are all in folder called blog in the root of my site), but use the text as the

问题 I'm currently writing a plugin for a customer, and while it's usually working good, I found that dbDelta does not allow me to create the table I need on plugin activation. I'm running the below code to bind the activation function: register_activation_hook(__FILE__, 'adminInstallation'); And this is the function itself: function adminInstallation(){ global $wpdb; $objectEquipment = 'wp_object_equipment'; $equipmentSQL = "CREATE TABLE ".$objectEquipment." ( id mediumint(9) NOT NULL AUTO

问题 I am completly new to databases and am trying to make a simple query to a postgreSQL database. Now the problem is that I don't really understand how things work. In my index.php I do $dbconn = pg_connect("host=myhost port=5432 dbname=mydbname user=myuser password=mypass sslmode=require options='--client_encoding=UTF8'") or die('Could not connect: ' . pg_last_error()); And I am connected to the database. When I try to query it from another myphp.php $query = "INSERT INTO public.account_recover

问题 Is there a way for a select statement to include in the WHERE clause a statement that is contained within the table? For example, the following table: CREATE TABLE test_tab( date_column DATE, frequency NUMBER, test_statement VARCHAR2(255) ) / If MOD(SYSDATE - DATE, frequency) = 0 were contained within the column test_statement , is there a way to select rows where this is true? The test_statement will vary and not be the same throughout the table. I am able to do this in PL/SQL but looking to

问题 I have n number of tables that are related on a many-to-many basis. I want to know how to represent such a model without creating an intermediary table for each relationship as that would result in some large number of tables. For this purpose assume that n is sufficiently large to not want to create tables. For example I may have three tables where n is 3: Parking_Lot Car Person A car can park in many parking lots and a parking lot will have many cars. A person may drive many cars and a car

问题 Looking for explanations for an error in a db insert, or update, I was told the problem is a customer name like: "BOB NULL-Creations" . What I have read about NULL doesn't allow me to accept that explanation so easily. However I have been wrong about other things before. Is it ever possible for the string 'NULL' to ever be interpreted as a NULL value in a situation where it is part of a string? A little more information The data is being ultimately viewed on an iPad so I am told the NULL

问题 So I have an interesting issue that I have never come across and can't seem to find much information about correcting the issue. I have massive database that has an enormous amount of data in it (10 years worth), and attempting to search through it. Now the search stuff works fine, but recently someone brought it to my attention about a 'bug' if you will. I've tried to trouble shoot it to get the expected results, but to no avail. This is my issue: When someone uses an apostrophe in the

问题 So I have an interesting issue that I have never come across and can't seem to find much information about correcting the issue. I have massive database that has an enormous amount of data in it (10 years worth), and attempting to search through it. Now the search stuff works fine, but recently someone brought it to my attention about a 'bug' if you will. I've tried to trouble shoot it to get the expected results, but to no avail. This is my issue: When someone uses an apostrophe in the

问题 I created a postgres DB instance on AWS RDS. I am trying to connect this DB instance to my django zappa app so I can perform AWS Lambda functions. I've added a new security group to my DB instance so I can allow my django app to connect to it: My DB details show that the new security group is active: However when I try to connect to it, either by running psql --host="*************.us-east-2.rds.amazonaws.com" --port="5432" --username="*********" --password --dbname="*****" via my terminal, or

问题 Is there a way I can access MySQL database using shell script? want to do some selects and some inserts on multiple tables? It will be great if you can give some sample code as I am new to scripting. 回答1: This link seems to have the information you want. http://www.cyberciti.biz/faq/using-mysql-in-shell-scripts/ mysql -u user -p dbnane 回答2: try this #!/bin/bash echo "show all tables" mysql -uroot -p'password' dbname<<EOFMYSQL show tables; EOFMYSQL echo "Count of all records" mysql -uroot -p