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PostgreSQL query always return true


PostgreSQL query always return true

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PostgreSQL query always return true
Tag : java , By : TomL
Date : November 25 2020, 09:00 AM

around this issue Take a look at the JavaDocs for Statement#execute(String)
try (Statement stmt = con.createStatement()) {
    try (ResultSet rs = stmt.executeQuery("select exists(select 1 from calcul where to_char(date, 'YYYY-MM')=to_char("+dates+", 'YYYY-MM') AND idproduit="+codeP+" AND ppa="+PPA+" AND tr="+TR+" AND net="+NET+" AND dateper='"+datePer+"')")) {
        if (rs.next()) {
            boolean exists = rs.getBoolean(1);
        }
    }
} catch (SQLException exp) {
    exp.printStackTrace();
}
try (PreparedStatement stmt = con.prepareStatement("select exists(select 1 from calcul where to_char(date, 'YYYY-MM')=to_char(?, 'YYYY-MM') AND idproduit=? AND ppa=? AND tr=? AND net=? AND dateper='?')")) {
    stmt.setString(1, dates);
    stmt.setString(2, codeP);
    stmt.setString(3, PPA);
    stmt.setString(4, TR);
    stmt.setString(5, NET);
    stmt.setString(6, datePer);
    try (ResultSet rs = stmt.executeQuery()) {
        if (rs.next()) {
            boolean exists = rs.getBoolean(1);
        }
    }
} catch (SQLException exp) {
    exp.printStackTrace();
}

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mysql query to return true if all status for a particular id field is true


Tag : php , By : John Miller
Date : March 29 2020, 07:55 AM
Hope this helps
You can use MySQL's MIN() function:
SELECT MIN(STATUS) FROM my_table WHERE ID = ?
SELECT ID, MIN(STATUS) FROM my_table GROUP BY ID

postgresql return true if table relationship


Tag : postgresql , By : Denis Chaykovskiy
Date : March 29 2020, 07:55 AM
may help you . I have a query for a table, garage. Garages have cars linked to them through column (garage_id).
select g.name, bool_or(c.garage_id is not null)
from
    garage g
    left join
    car c on g.garage_id = c.garage_id
group by g.name

Postgresql postgis ST_DWithin always return true


Tag : postgresql , By : Andrew Bailey
Date : March 29 2020, 07:55 AM
To fix the issue you can do The coordinates you are using are not in CRS 3857 but are rather unprojected lat-long, i.e. CRS 4326, so you are looking for points within 100 degrees of each others. You would need to create the point in 4326, project it in 3857 using ST_Transform and then make the distance computation in meters.
SELECT ST_DWithin (
   ST_Transform(ST_GeomFromText('POINT(76.8598076 43.2137617)',4326),3857),
   ST_Transform(ST_GeomFromText('POINT(76.865100 43.220109)',4326),3857),
   100
);
SELECT ST_Distance_Sphere (
   ST_GeomFromText('POINT(76.8598076 43.2137617)',4326),
   ST_GeomFromText('POINT(76.865100 43.220109)',4326))
   <= 100;

Can browser.tabs.query({active: true, currentWindow: true}) ever return more than one tab?


Tag : google-chrome-extens , By : Adam May
Date : March 29 2020, 07:55 AM
Hope that helps TLDR: No
For Chrome, Opera and Firefox this is currently impossible, so it's safe to assume that the array will only contain one element.

Why does a query where basic expression true == true return no documents?


Tag : mongodb , By : Ernie Thomason
Date : March 29 2020, 07:55 AM
hop of those help? The basic mongo query is about object matching. Your { true: true } query will find documents where the "true" field is true.
If you want expression equivalence, check out $expr:
db.records.find({ $expr: { $eq: [true , true] } })
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