Recent questions tagged SQL

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - how to change the collate to all the columns of the database?

0 like 0 dislike

315 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - How can I get a plain text postgres database dump on heroku?

0 like 0 dislike

228 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Why is there a HUGE performance difference between temp table and subselect

0 like 0 dislike

261 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - in general, should every table in a database have an identity field to use as a PK?

0 like 0 dislike

237 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - SQLite - replace part of a string

0 like 0 dislike

342 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - MySQL very slow for alter table query

0 like 0 dislike

484 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - How can I tell if a database table is being accessed anymore? Want something like a "SELECT trigger"

0 like 0 dislike

309 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - How do you check if a certain index exists in a table?

0 like 0 dislike

444 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - How can I avoid NULLs in my database, while also representing missing data?

0 like 0 dislike

275 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Select multiple columns from a table, but group by one

0 like 0 dislike

1.6k views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Add primary key to existing table

0 like 0 dislike

283 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - From a Sybase Database, how I can get table description ( field names and types)?

0 like 0 dislike

302 views 1 answer

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Using group by and having clause

0 like 0 dislike

257 views 1 answer