我试图按两个值分组,因为我想从数据库中删除重复项,但是以某种方式我的group by
子句不想工作(字段在varchar中)。我还检查了是否有空间或更多,但没有。
该服务器是mariadb服务器,我使用一个简单的HeidiSQL客户端
SELECT Player, COUNT(Player)
FROM Players
GROUP BY Player
我希望它只是按分组,以便删除重复的值。
这是我目前得到的结果:
与SELECT CONCAT相同:
答案 0 :(得分:1)
我找到了答案,问题是在其他行上有换行符,所以mysql无法用我的SELECT
找到它,我创建了一个bash脚本来修复它:
#!/bin/bash
export MYSQL_PWD="YOURPWD"
runSQL() {
runSQLOutput=$(mysql -sN --user="YOURUSER" -h 127.0.0.1 -P 3306 --database="Factorio-Stats")
}
runSQL <<EOF
SELECT Player
FROM Players
EOF
mapfile -t Players < <(printf "%s\n" "$runSQLOutput")
for Players in "${Players[@]}"
do
test=`echo $Players | sed 's~[^[:alnum:]/]\+~~g'`
runSQL <<EOF
SELECT Id_Players
FROM Players
WHERE Player = "$Players"
EOF
runSQL <<EOF
UPDATE Players
SET Player="$test"
WHERE Id_Players="$runSQLOutput"
EOF
echo "updated $test"
done