Difference between revisions of "Select"
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{{lowercase}} | {{lowercase}} | ||
| + | select | ||
| + | [[select count]] | ||
| + | [[select distinct]] | ||
| − | [[PostgreSQL select]]: | + | [[PostgreSQL select|PostgreSQL]]: |
| − | * <code> select * from your_table_name</code> | + | * <code> select * from your_table_name;</code> |
| + | * <code> select * from your_db.your_table_name;</code> | ||
| + | * <code>[[SELECT * FROM pg_stat_activity;]]</code> | ||
| + | * <code>[[SELECT version();]]</code> | ||
| + | * <code>[[SELECT current user;]]</code> | ||
| + | * <code>[[SELECT current database();]]</code> | ||
| + | |||
SELECT * FROM your_table_name; | SELECT * FROM your_table_name; | ||
[[ERROR: permission denied for table]] your_table_name | [[ERROR: permission denied for table]] your_table_name | ||
| − | + | ||
| − | |||
* <code>[[select]] current_setting('[[block_size]]');</code> | * <code>[[select]] current_setting('[[block_size]]');</code> | ||
| Line 16: | Line 24: | ||
* [[MySQL]]: <code>[[select user]] FROM [[mysql.user]];</code> | * [[MySQL]]: <code>[[select user]] FROM [[mysql.user]];</code> | ||
| + | |||
| + | [[jq]]: | ||
* <code>[[jq]] '.[] | [[select]](.color=="blue")' your_json_file.json</code> | * <code>[[jq]] '.[] | [[select]](.color=="blue")' your_json_file.json</code> | ||
| + | * <code>cat file.txt | jq '.Quotas[] | select(.QuotaName | [[contains]]("G and VT")) | {QuotaName, Value, QuotaArn, QuotaCode, Unit}'</code> | ||
| + | |||
| + | |||
== Related terms == | == Related terms == | ||
* [[MongoDB]]: <code>db.YOUR_COLLETION_NAME.[[find]] ()</code> | * [[MongoDB]]: <code>db.YOUR_COLLETION_NAME.[[find]] ()</code> | ||
* <code>[[select count]]</code> | * <code>[[select count]]</code> | ||
| + | * <code>[[select distinct]]</code> | ||
* <code>[[GRANT SELECT]]</code> | * <code>[[GRANT SELECT]]</code> | ||
| − | * <code>[[ | + | **<code>[[GRANT SELECT ON ALL TABLES]]</code> |
| + | * <code>[[ERROR: permission denied for relation]] your_table</code> | ||
| + | * [[SELECT can cause synchronous writes on the disk]] | ||
== See also == | == See also == | ||
| + | * {{SELECT}} | ||
* {{SQL}} | * {{SQL}} | ||
[[Category:Computing]] | [[Category:Computing]] | ||
Latest revision as of 14:20, 22 May 2024
select select count select distinct
select * from your_table_name;select * from your_db.your_table_name;SELECT * FROM pg_stat_activity;SELECT version();SELECT current user;SELECT current database();
SELECT * FROM your_table_name; ERROR: permission denied for table your_table_name
select current_setting('block_size');
- MySQL:
select user FROM mysql.user;
jq:
jq '.[] | select(.color=="blue")' your_json_file.jsoncat file.txt | jq '.Quotas[] | select(.QuotaName | contains("G and VT")) | {QuotaName, Value, QuotaArn, QuotaCode, Unit}'
Related terms[edit]
- MongoDB:
db.YOUR_COLLETION_NAME.find () select countselect distinctGRANT SELECTERROR: permission denied for relation your_table- SELECT can cause synchronous writes on the disk
See also[edit]
- SELECT, GRANT SELECT ON, BETWEEN
- SQL, NewSQL, RDMS: GraphQL (2015), SQLite,
select, insert,select count, Distributed SQL, TablePlus, Cache hit ratio,pg_stat_user_tables,EXPLAIN, Index (PostgreSQL), DDL, SQL/MED, Group by, List users, SQL Injection, SQLAlchemy,CREATE USER, CREATE ROLE, EXPLAIN, ALTER DATABASE, REVOKE, NOLOCK, NOWAIT, EXISTS, Unique constraint,.sql
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