diff --git a/src/includes/class.db.mysql.php b/src/includes/class.db.mysql.php
index f32b921..63731e7 100644
--- a/src/includes/class.db.mysql.php
+++ b/src/includes/class.db.mysql.php
@@ -178,6 +178,12 @@ class Database_Mysql extends Database_Abstract
         return '`'. $column. '` LIKE '. $this->quoteForLike($format, $string);
     }
 
+    function ciEquals(string $column, string $value): string
+    {
+        $column = str_replace('`', '``', $column);
+        return 'LOWER(`'. $column. '`) = LOWER('. $this->quote($value). ')';
+    }
+
     function lastInsertId(?string $name = null): ?string
     {
         $ret = $this->dbh->lastInsertId();
diff --git a/src/includes/class.db.mysqli.php b/src/includes/class.db.mysqli.php
index 93b9d8c..679e9bc 100644
--- a/src/includes/class.db.mysqli.php
+++ b/src/includes/class.db.mysqli.php
@@ -151,6 +151,12 @@ class Database_Mysqli extends Database_Abstract
         return '`'. $column. '` LIKE '. $this->quoteForLike($format, $string);
     }
 
+    function ciEquals(string $column, string $value): string
+    {
+        $column = str_replace('`', '``', $column);
+        return 'LOWER(`'. $column. '`) = LOWER('. $this->quote($value). ')';
+    }
+
     function tableExists(string $table): bool
     {
         $r = $this->sq("SELECT 1 FROM information_schema.tables WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?",
diff --git a/src/includes/class.db.postgres.php b/src/includes/class.db.postgres.php
index 776c557..3a8e57e 100644
--- a/src/includes/class.db.postgres.php
+++ b/src/includes/class.db.postgres.php
@@ -181,6 +181,12 @@ class Database_Postgres extends Database_Abstract
         return '"'. $column. '" ILIKE '. $this->quoteForLike($format, $string);
     }
 
+    function ciEquals(string $column, string $value): string
+    {
+        $column = str_replace('"', '""', $column);
+        return 'LOWER("'. $column. '") = LOWER('. $this->quote($value). ')';
+    }
+
     function lastInsertId(?string $name = null): ?string
     {
         $ret = $this->dbh->lastInsertId();
diff --git a/src/includes/class.db.sqlite3.php b/src/includes/class.db.sqlite3.php
index 0f80b4a..546c105 100644
--- a/src/includes/class.db.sqlite3.php
+++ b/src/includes/class.db.sqlite3.php
@@ -188,6 +188,15 @@ class Database_Sqlite3 extends Database_Abstract
         return 'utf8_lower("'. $column. '") LIKE '. $this->quoteForLike($format, $this->utf8_lower($string));
     }
 
+    function ciEquals(string $column, string $value): string
+    {
+        $column = str_replace('"', '""', $column);
+        if ($this->useNormalizedUtf8) {
+            return 'utf8_normalized_lower("'. $column. '") = '. $this->quote($this->utf8_normalized_lower($value));
+        }
+        return 'utf8_lower("'. $column. '") = '. $this->quote($this->utf8_lower($value));
+    }
+
     function lastInsertId(?string $name = null): ?string
     {
         $ret = $this->dbh->lastInsertId();
diff --git a/src/includes/class.dbconnection.php b/src/includes/class.dbconnection.php
index 389510c..aa8e44a 100644
--- a/src/includes/class.dbconnection.php
+++ b/src/includes/class.dbconnection.php
@@ -55,6 +55,7 @@ abstract class Database_Abstract
     abstract function quote($value): string;
     abstract function quoteForLike(string $format, string $string): string;
     abstract function like(string $column, string $format, string $string): string;
+    abstract function ciEquals(string $column, string $value): string;
     abstract function lastInsertId(?string $name = null): ?string;
     abstract function tableExists(string $table): bool;
     abstract function tableFieldExists(string $table, string $field): bool;
diff --git a/src/includes/class.dbcore.php b/src/includes/class.dbcore.php
index 2191188..313d93e 100644
--- a/src/includes/class.dbcore.php
+++ b/src/includes/class.dbcore.php
@@ -191,7 +191,7 @@ class DBCore
     function getTagIdsByName(string $name): array
     {
         $db = DBConnection::instance();
-        $q = $db->dq("SELECT id FROM {$db->prefix}tags WHERE ". $db->like('name', '%s', $name));
+        $q = $db->dq("SELECT id FROM {$db->prefix}tags WHERE ". $db->ciEquals('name', $name));
         $a = [];
         while ($r = $q->fetchAssoc()) {
             $a[] = (int) $r['id'];