I try to get values that contains words in my sql database. I try with "contains" but I get an error. I work with SQL
This is my code:
router.post('/busca',isLoggedIn, async (req,res) => {
const {busca} = req.body;
const buscar = Object.values({busca});
const bus = await pool.query('SELECT * FROM links WHERE title CONTAINS ?',[buscar]);
res.render('links/busca',{buscar, bus});
});
I have this error:
UnhandledPromiseRejectionWarning: Error: ER_PARSE_ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(title, 'a')' at line 1
You can use LIKE operator :
SELECT * FROM links WHERE title LIKE '%word%';
if you are more than one word use and or or operator
SELECT * FROM links WHERE title LIKE '%word%' AND title LIKE '%secondword%';
Contains doesn't exist in mysql .
use LIKE
const bus = await pool.query('SELECT * FROM links WHERE title LIKE ?',[%buscar%]);
Related
I am trying to access a DynamoDb table, but I keep getting a "Resource not found" error.
The table is defined as follows, note that the table is Active and the Region is Paris (eu-west-3)
The code I am using:
export class EncuestaComponent implements OnInit {
[...]
client: DynamoDBClient = new DynamoDBClient({
region : 'eu-west-3',
credentials: {
accessKeyId: '[REDACTED]',
secretAccessKey: '[REDACTED]'
}
});
[...]
onDbClick() {
const commandParams = {};
const input: BatchExecuteStatementInput = {
Statements: [
{Statement: "SELECT opciones FROM encuesta.encuesta WHERE id = 'user.1'"}
],
}
const command = new BatchExecuteStatementCommand(input);
this.client.send(command).
then(data => console.log(data.Responses![0].Error)).
catch(error => {console.log("Error"); console.log(error)});
}
And, in the console, it shows that the then method has been executed, but the message printed is {Code: 'ResourceNotFound', Message: 'Requested resource not found'}
What am I doing wrong?
In PartiQL for DynamoDB, when you do select * from something.else means that you want it to query an index named else on table named something. Either you need to do one of the following:
escape the .
surround the table name with quotes
create a new table with a different name
I am not in front of my computer or i would figure out which it is for you, but this is where I'd start.
Here is something that might be causing the problem.
Can you confirm that
the accessKey that you are using have permission to read from the DynamoDB table?
that the accessKey has not expired and can be used?
Here are a few things that can help you test out the functionality try adding the key in ~/.aws/credentials and running this command.
aws dynamodb scan --table-name encuesta.encuesta
and confirm that it is indeed showing up the table content and not getting an access denied error.
I am trying to workout how to pass in a comma sepated string of values into a postgres select within in clause query using node-postgres but unfortunately can't seem to get it working and can't find any examples.
I have the following code:
function getUser() {
let inList = "'qwerty', 'qaz'";
const result = await pgPool.query("SELECT name FROM my_table WHERE info IN ($1)", [inList]);
if (result.rowCount == 1) return result.rows.map(row => row.name)
return false
}
Basically want the end result query to process:
SELECT name FROM my_table WHERE info IN ('qwerty', 'qaz')
Unsure if this is actually the correct way of doing this with pgPool?
The right way is in the FAQ on Github --> https://github.com/brianc/node-postgres/wiki/FAQ#11-how-do-i-build-a-where-foo-in--query-to-find-rows-matching-an-array-of-values
You should be able to do it that way :
pgPool.query("SELECT name FROM my_table WHERE info = ANY ($1)", [jsArray], ...);
In my current scenario, a third party will be creating tables dynamically on my DB, and storing the table name as a varchar and column names as jsonb in other table which is defined as an Entity in my NestJS backend.
This is so I can keep track (and query) these tables, since I have no control over its creation.
For this purpose I'd like to use TypeORM's createQueryBuilder instead of using raw queries as its easier for me to play with abstraction.
As far as I know TypeORMs createQueryBuilder needs a defined Entity in the from clause.
Something like this:
return await getManager()
.createQueryBuilder()
.select('*')
.from(MyDefinedModel, 'modelAlias')
.getRawMany();
}
So I'd like to do something like:
const tableName = await getDynamicallyGenetaredTableNames().getFirstOne()
// now tableName points to a string that is a table name, i.e 'table-data-192239'
return await getManager()
.createQueryBuilder()
.select('*')
.from(tableName, 'tableAlias')
.getRawMany();
So passing the table name I point to the right table, but TypeORM (and TS) complains because that tableName is a string, and not an Entity (Class) type
I really don't want to type-cast and start doing nasty things if there is something cleaner to achieve this.
I didn't find any solution in the official docs
Any brilliant ideas out there?
Thanks, y'all
We can pass table name instead of Entity for getRepository.
let tableName = 'user';
let query = getRepository(tableName).createQueryBuilder(tableName);
You can select from a table by its table name without defining an entity before like this:
const res = await manager
.createQueryBuilder()
.select()
.from("tableName", null)
.where("tableName.id = :id", { id: 1 })
.getRawMany();
Be sure that you set the second parameter of the from() explicitly to null.
You could try using a raw query:
import { getManager } from 'typeorm'
const tableName = await getDynamicallyGenetaredTableNames().getFirstOne()
// Use the table name in a raw SQL query
const result = await getManager().query(`SELECT * FROM ${tableName}`)
Does the sqlite3 library for NodeJS support parameters for WHERE IN queries?
I have the following small program.
const sqlite3 = require('sqlite3');
const db = new sqlite3.Database('./data/data.db');
const sql = `
SELECT * FROM accounts
WHERE
name IN ('Business Expense - Internet Service','RCSB Checking')`;
db.all( sql,
function getAccout(error, rows) {
console.log(error);
console.log(rows);
});
The program "works". It queries the database, and the rows variable is successfully populated with data from two separate rows.
However, I don't want hard coded values. I want to parameterize my values. The following code works for that.
const sql = `
SELECT * FROM accounts
WHERE
name = ? OR name = ?`;
db.all( sql,
['Business Expense - Internet Service','RCSB Checking'],
function getAccout(error, rows) {
console.log(error);
console.log(rows);
});
However, I want this to work with any number of names. i.e. I want to parameterize the original WHERE IN query. However, the following program
const sql = `
SELECT * FROM accounts
WHERE
name IN (?)`;
db.all( sql,
[['Business Expense - Internet Service','RCSB Checking']],
function getAccout(error, rows) {
console.log(error);
console.log(rows);
});
does not work. It runs without error, but returns zero rows. I also tried using a concatenated string as the param
const sql = `
SELECT * FROM accounts
WHERE
name IN (?)`;
db.all( sql,
["'Business Expense - Internet Service','RCSB Checking'"],
function getAccout(error, rows) {
console.log(error);
console.log(rows);
});
and this also didn't work.
Does the sqlite3 library support parameterizing WHERE IN queries? If so, what's the syntax for doing so? If not, are there common work arounds to this in the NodeJS community?
I don't know if there is support for it, but in case there is not
const params = [...]
const sql = `
SELECT * FROM accounts
WHERE
name IN (${new Array(params.length).fill('?').join(',')})`;
I was going to suggest using JS string literals as well. Seems more like the 'node way' of doing things.
I m actually using the mysql module to query my database and I m facing a problem. In fact, I need to escape a full object and parse it in a query that mysql could understand.
Actually, I have :
getByCriteria: (collectionName, criteria)->
sql = 'SELECT * FROM ?? WHERE ?'
inserts = [collectionName, criteria]
sql = MySql.format(sql, inserts)
deferred = Q.defer()
MysqlAdapter.CONNECTION.query(sql, (err, rows, fields)->
console.log err
if err
deferred.reject(new Error(err))
else
deferred.resolve(rows)
)
return deferred.promise
But the console.log(sql) prints :
SELECT * FROM user WHERE username = 'admin', id=1
So I have guessed that the "Mysql.format" returns a string for the INSERT/UPDATE SQL actions.
How can I do it with mysql, without parsing the entire string with a homemade solution ?
THanks for advance
I'm afraid that MySql.format() is very simple (https://github.com/felixge/node-mysql/blob/master/lib/protocol/SqlString.js#L67) so you'll need to do your own formatting.
Just remember to escape values with MySql.escape() and identifiers with MySql.escapeId()
You'll need something similar to SqlString.objectToValues() https://github.com/felixge/node-mysql/blob/master/lib/protocol/SqlString.js#L109 but with values joined with AND instead of ,