I receive such an array:
[1,2,3,4,5];
And I need to implement a query that has many ORs in WHERE clause. I take values from my array. It looks like this:
SELECT foo, bar FROM tbl WHERE (a.bar = 1 OR a.bar = 2 OR a.bar = 3 ... and so on)
How may I create such a WHERE part in node-mysql? Or how to pass it parameters?
I know this is fairly old, but I've had success, at least with recent versions of node-mysql using this format:
var titles = ['title 1', 'title 2'];
var sql = 'SELECT t.id ' +
' FROM topics t ' +
' WHERE t.title IN (?)';
var params = [titles];
This translates pretty nicely to:
SELECT t.id FROM topics t WHERE t.title IN (\'title 1\', \'title 2\')
Much cleaner, I think.
simple thing to do is to use the join() of the array
var values = [1, 2, 3, 4, 5];
var query = 'SELECT foo, bar FROM tbl WHERE (a.bar = ';
query = query + values.join(' OR a.bar = ') + ')';
That will generate the query you're looking for
Related
I'm trying to select multiple matches from a field, I have the query working as SQL but am at a loss when it comes to the jOOQ version. Here's the SQL:
SELECT
array_to_string(array(select array_to_string(regexp_matches(m.content, '#([a-zA-Z0-9]+)', 'g'), ' ')), ' ') hashtags
FROM tweets
But I can't work out how to pass in the 'g' flag to regexp_matches, and Postgres doesn't support g: style embedded flags. At the moment I'm using (in Scala):
val hashtags = DSL.field(
"array_to_string(array(select array_to_string(regexp_matches(tweets.content, '#([a-zA-Z0-9]+)', 'g'), ' ')), ' ')",
classOf[String])
but that seems kind of gross (but it works, so there's that! 😀).
Current Approach
I have an enum with fields associated with it, like this:
MentionUri(MENTIONS.URL),
Content(MENTIONS.CONTENT),
Hashtags(DSL.field(
"array(select array_to_string(regexp_matches(mentions.content, '#([a-zA-Z0-9]+)', 'g'), ' '))").as("hashtags")),
MediaLinks(DSL.field("json_agg(twitter_media)").as("media_links")),
Location(MENTIONS.LOCATION),
the 'g' flag is needed because I want to get all of the matching fragments from the target text (all of the hashtags from the mention content in this case, where mentions are Tweets, Facebook posts, &c.)
and a class with a bunch of optional search parameters, like this:
minFollowing: Option[Int] = None,
maxFollowing: Option[Int] = None,
workflowStates: Set[WorkflowState] = WorkflowState.values.toSet,
onlyVerifiedUsers: Boolean = false,
and then I build up the query based on a list of these fields
private val fields = v.fields.toSet
override def query(sql: DSLContext): Query = {
val fields = v.fields.map(_.field) ++ Seq(M.PROJECT_ID)
var query = (sql
select fields.toSet.asJava
from M
leftJoin MTM on (M.PROJECT_ID === MTM.PROJECT_ID) and (M.ID === MTM.MENTION_ID)
leftJoin TM on (MTM.URL === TM.URL)
where (M.PROJECT_ID in v.criteria.projectIds.asJava))
if (v.criteria.channels.size < numChannels)
query = query and (M.CHANNEL in v.criteria.channels.asJava)
if (v.criteria.mentionTypes.size < numMentionTypes)
query = query and (M.MENTION_TYPE in v.criteria.mentionTypes.asJava)
// ... more critera get added here, finally ...
if (v.max.isDefined)
query groupBy (M.PROJECT_ID, M.ID, M.CHANNEL, M.USERNAME) limit v.max.get
else
query groupBy (M.PROJECT_ID, M.ID, M.CHANNEL, M.USERNAME)
How to execute the following query
select * from table1 union select * from table2
in zend-framework2 where i am using tablegateway? In the documentation of zf2,they didn't give any details about union query.
Try -
$select1 = new Select('table1');
[.... rest of the code ....]
$select2 = new Select('table2');
[.... rest of the code ....]
$select1->combine($select2); //This will create the required SQL union statement.
To get count of the two tables you have to use a bit of SQL rather then tableGateway -
$sql = new Sql($this->tableGateway->adapter);
$select_string = $sql->getSqlStringForSqlObject($select1);
$sql_string = 'SELECT * FROM (' . $select_string . ') AS select_union';
$statement = $this->tableGateway->adapter->createStatement($sql_string);
$resultSet = $statement->execute();
$total_records = count($resultSet);
$resultSet gives data.
$total_records gives total no. of records.
When using the SqlBuilder class of DBExtensions, is it possible to build multiple select statements that are executed in a single round trip?
Something along the lines of:
select t1.* from Table1 t1 where t1.Foo = 'Bar 1';
select t2.* from Table2 t2 where t2.Foo = 'Bar 2';
For the building part, you can do:
var query1 = SQL
.SELECT("t1.*")
.FROM("Table1 t1")
.WHERE("t1.Foo = {0}", "Bar 1");
var query2 = SQL
.SELECT("t2.*")
.FROM("Table2 t2")
.WHERE("t2.Foo = {0}", "Bar 2");
var batchQuery = SqlBuilder.JoinSql(";", query1, query2);
About execution, I have no idea if your ADO.NET provider supports batch SELECT queries, maybe you want to do a UNION query instead?
I have a table that I am trying to update multiple values at once. Here is the table schema:
Column | Type | Modifiers
---------------+---------+-----------
user_id | integer |
subservice_id | integer |
I have the user_id and want to insert multiple subservice_id's at once. Is there a syntax in Postgres that will let me do something like this
insert into user_subservices(user_id, subservice_id) values(1, [1, 2, 3]);
How would I do this?
Multi-value insert syntax is:
insert into table values (1,1), (1,2), (1,3), (2,1);
But krokodilko's answer is much slicker.
Try:
INSERT INTO user_subservices(user_id, subservice_id)
SELECT 1 id, x
FROM unnest(ARRAY[1,2,3,4,5,6,7,8,22,33]) x
Demo: http://www.sqlfiddle.com/#!15/9a006/1
A shorter version of krokodilko's answer:
insert into user_subservices(user_id, subservice_id)
values(1, unnest(array[1, 2, 3]));
A slightly related answer because I keep finding this question every time I try to remember this solution. Insert multiple rows with multiple columns:
insert into user_subservices (user_id, subservice_id)
select *
from unnest(array[1, 2], array[3, 4]);
More robust example, for when you need to insert multiple rows into some table for every row in another table:
INSERT INTO user_subservices (user_id, subservice_id)
SELECT users.id AS user_id, subservice_id
FROM users
CROSS JOIN unnest(ARRAY[1,2,3]) subservice_id;
For multiple values, this function might be helpful.
This function generates multiple values
const _multiInsert = arrOfValues => {
// removes lastCharacter
const _remLastChar = str => str.slice(0, str.length - 1);
let foramttedQuery = '';
arrOfValues.forEach(row => {
let newRow = '';
for (const val of Object.values(row)) {
let newValue = '';
if (typeof val === 'string') newValue = `'${val}',`;
else newValue = `${val},`;
newRow = newRow.concat(newValue);
}
foramttedQuery = foramttedQuery.concat(`(${_remLastChar(newRow)}),`);
});
return _remLastChar(foramttedQuery);
};
const arr_Of_Values = [
{
id: 1,
name: "SAMPLE_NAME_1",
},
{
id: 2,
name: "SAMPLE_NAME2",
}
]
const query_template = `INSERT INTO TABLE_NAME VALUES ${_multiInsert(arr_Of_Values)}`
console.log(query_template)
I am writing a Doctrine 2.3 Query and I am facing some issues:
The SQL Query which I am reflecting was:
SELECT *
FROM `entry`
WHERE `plate` LIKE '%'
AND `recognition_datetime` BETWEEN '2013-03-13 22:20:18'
AND '2013-03-13 22:20:20';
I am getting the out put with the rows selected.
Doctrine which I am trying:
Opt 1:
$qry = $this->manager()->createQueryBuilder()
->from($this->entity, 'e')
->select('e');
$qry->where('e.plate like :plate');
$qry->setParameter('plate', $plate);
$qry->add('where', "e.datetime between '2013-03-13 22:20:18' and '2013-03-13 22:20:20'");
$qry->setMaxResults( $limit );
It out puts only the first where condition:
SELECT e FROM Myproject\Domain\result e WHERE e.plate like '%'
Opt 2:
$qry = $this->manager()->createQueryBuilder()
->from($this->entity, 'e')
->select('e');
$qry->where('e.plate like :plate');
$qry->setParameter('plate', $plate);
$qry->andWhere('e.datetime BETWEEN :monday AND :sunday')
->setParameter('monday', $fromdate->format('Y-m-d H:i:s'))
->setParameter('sunday', $todate->format('Y-m-d H:i:s'));
It prints only the second where as query. Can some one help me how to write multiple where/And/or condition?
After some Research I found few thing which solved my problems:
Query Generation:
//CREATING QUERY BUILDER
$qry = $this->manager()->createQueryBuilder()
->from('YOUR_ENTITY_HERE', 'e')
->select('e');
//LIKE
$ex1 = $qry->expr()->like('e.user', "'".$user."'");
//BETWEEN
$ex2 = $qry->expr()->between('e.datetime',"'".$datetime."'","'".$dateto."'");
//IN
$ex3 = $qry->expr()->in('e.country', $country);
//ADDING ALL EXPRESSION TO ONE INBETWEEN EXPRESSION "AND" OPERATION
$Query = $qry->expr()->andX($ex1,$ex2,$ex3);
//ADDING ALL EXPRESSION TO ONE INBETWEEN EXPRESSION "OR" OPERATION
$Query = $qry->expr()->orX($ex1,$ex2,$ex3);
//ADDING TOTAL EXPRESSIONS TO WHERE
$qry->where($Query);
//GENERATE QUERY
$qry->getQuery();
//FINAL OPERATIONS
//EXECUTE
$qry->execute();
//GET ARRAY OUT PUT
$qry->getArrayResult();
//GET DB OBJECT
$qry->getResult();
Other Methods for Providing IN Operations:
OTHER WAY TO USE IN OPERATION:
$country=array('Us','UK','IND','BE');
$exp = $this->manager()->getExpressionBuilder();
$qry = $this->manager()->createQueryBuilder()
->select('e')
->from('YOUR_ENTITY_HERE', 'e')
->add('where', $exp->in('e.country', $country));