GaussDB-查看数据

2025-01-22 75 阅读1分钟

GaussDB-查看数据

使用系统表pg_tables查询数据库所有表的信息。

| ``` gaussdb=# SELECT * FROM pg_tables;
```
| ------------------------------------------- |
```
使用gsql的\d+命令查询表的属性。

| ``` gaussdb=# \d+ customer_t1;
```
| ----------------------------------- |
```
执行如下命令查询表customer_t1****的数据量。

| ``` gaussdb=# SELECT count(*) FROM customer_t1;
```
| ---------------------------------------------------- |
```
执行如下命令查询表customer_t1的所有数据。

| ``` gaussdb=# SELECT * FROM customer_t1;
```
| --------------------------------------------- |
```
执行如下命令只查询字段c_customer_sk的数据。

| ``` gaussdb=# SELECT c_customer_sk FROM customer_t1;
```
| --------------------------------------------------------- |
```
执行如下命令过滤字段c_customer_sk的重复数据。

| ``` gaussdb=# SELECT DISTINCT( c_customer_sk ) FROM customer_t1;
```
| --------------------------------------------------------------------- |
```
执行如下命令查询字段c_customer_sk为3869的所有数据。

| ``` gaussdb=# SELECT * FROM customer_t1 WHERE c_customer_sk = 3869;
```
| ------------------------------------------------------------------------ |
```
执行如下命令按照字段c_customer_sk进行排序。

| ``` gaussdb=# SELECT * FROM customer_t1 ORDER BY c_customer_sk;
```
| -------------------------------------------------------------------- |
```

更多详情请参考GaussDB 文档中心：doc.hcs.huawei.com/db/zh-cn/ga…